diff --git a/packages/sanity/src/core/field/types/portableText/diff/components/Annotation.tsx b/packages/sanity/src/core/field/types/portableText/diff/components/Annotation.tsx
index 07fd0469140..f15fe1feae4 100644
--- a/packages/sanity/src/core/field/types/portableText/diff/components/Annotation.tsx
+++ b/packages/sanity/src/core/field/types/portableText/diff/components/Annotation.tsx
@@ -1,12 +1,11 @@
 import {ChevronDownIcon} from '@sanity/icons'
 import {useClickOutside, Label, Popover, Flex} from '@sanity/ui'
 import {toString} from '@sanity/util/paths'
-import {isKeySegment, ObjectSchemaType, Path} from '@sanity/types'
+import {isKeySegment, ObjectSchemaType, Path, PortableTextChild} from '@sanity/types'
 import React, {useCallback, useContext, useEffect, useMemo, useState} from 'react'
 import styled from 'styled-components'
 import {ChangeList, DiffContext, DiffTooltip, useDiffAnnotationColor} from '../../../../diff'
 import {ObjectDiff} from '../../../../types'
-import {PortableTextChild} from '../types'
 import {isEmptyObject} from '../helpers'
 import {ConnectorContext, useReportedValues} from '../../../../../changeIndicators'
 import {InlineBox, InlineText, PopoverContainer, PreviewContainer} from './styledComponents'
diff --git a/packages/sanity/src/core/field/types/portableText/diff/components/Block.tsx b/packages/sanity/src/core/field/types/portableText/diff/components/Block.tsx
index 76ad5da5f74..655b72e25cc 100644
--- a/packages/sanity/src/core/field/types/portableText/diff/components/Block.tsx
+++ b/packages/sanity/src/core/field/types/portableText/diff/components/Block.tsx
@@ -1,9 +1,9 @@
 import {Box, Card, Stack, Text} from '@sanity/ui'
-import {Path} from '@sanity/types'
+import {Path, PortableTextTextBlock} from '@sanity/types'
 import React, {useCallback, useContext} from 'react'
 import {DiffContext, DiffTooltip, useDiffAnnotationColor} from '../../../../diff'
 import {isHeader} from '../helpers'
-import {PortableTextBlock, PortableTextDiff} from '../types'
+import {PortableTextDiff} from '../types'
 import {ConnectorContext} from '../../../../../changeIndicators'
 import Blockquote from './Blockquote'
 import Header from './Header'
@@ -13,7 +13,7 @@ const EMPTY_PATH: Path = []
 
 export default function Block(props: {
   diff: PortableTextDiff
-  block: PortableTextBlock
+  block: PortableTextTextBlock
   children: JSX.Element
 }): JSX.Element {
   const {diff, block, children} = props
diff --git a/packages/sanity/src/core/field/types/portableText/diff/components/InlineObject.tsx b/packages/sanity/src/core/field/types/portableText/diff/components/InlineObject.tsx
index a20d2cf7c60..87c6d277a9e 100644
--- a/packages/sanity/src/core/field/types/portableText/diff/components/InlineObject.tsx
+++ b/packages/sanity/src/core/field/types/portableText/diff/components/InlineObject.tsx
@@ -1,12 +1,17 @@
 import {ChevronDownIcon} from '@sanity/icons'
-import {isKeySegment, ObjectSchemaType, Path} from '@sanity/types'
+import {
+  isKeySegment,
+  ObjectSchemaType,
+  Path,
+  PortableTextChild,
+  PortableTextObject,
+} from '@sanity/types'
 import {Card, Flex, Label, Popover, useClickOutside} from '@sanity/ui'
 import {FOCUS_TERMINATOR, toString} from '@sanity/util/paths'
 import React, {useCallback, useContext, useState, useEffect, useMemo} from 'react'
 import styled from 'styled-components'
 import {ChangeList, DiffContext, DiffTooltip, useDiffAnnotationColor} from '../../../../diff'
 import {ObjectDiff} from '../../../../types'
-import {PortableTextChild} from '../types'
 import {isEmptyObject} from '../helpers'
 import {ConnectorContext, useReportedValues} from '../../../../../changeIndicators'
 import {Preview} from '../../../../../preview/components/Preview'
@@ -14,7 +19,7 @@ import {InlineBox, InlineText, PopoverContainer, PreviewContainer} from './style
 
 interface InlineObjectProps {
   diff?: ObjectDiff
-  object: PortableTextChild
+  object: PortableTextObject
   path: Path
   schemaType?: ObjectSchemaType
 }
diff --git a/packages/sanity/src/core/field/types/portableText/diff/components/PortableText.tsx b/packages/sanity/src/core/field/types/portableText/diff/components/PortableText.tsx
index 9b824e1164c..d4c5db5246b 100644
--- a/packages/sanity/src/core/field/types/portableText/diff/components/PortableText.tsx
+++ b/packages/sanity/src/core/field/types/portableText/diff/components/PortableText.tsx
@@ -1,9 +1,15 @@
-import {ObjectSchemaType, SchemaType} from '@sanity/types'
+import {
+  isPortableTextSpan,
+  ObjectSchemaType,
+  PortableTextChild,
+  PortableTextTextBlock,
+  SpanSchemaType,
+} from '@sanity/types'
 import {startCase, uniq, xor} from 'lodash'
 import React, {ReactElement, useCallback, useMemo} from 'react'
 import {DiffCard} from '../../../../diff'
 import {ArrayDiff, ObjectDiff, StringDiff, StringDiffSegment} from '../../../../types'
-import {PortableTextBlock, PortableTextChild, PortableTextDiff, SpanTypeSchema} from '../types'
+import {PortableTextDiff} from '../types'
 
 import * as TextSymbols from '../symbols'
 
@@ -43,7 +49,7 @@ type Props = {
 
 export default function PortableText(props: Props): JSX.Element {
   const {diff, schemaType} = props
-  const block = (diff.origin.toValue || diff.origin.fromValue) as PortableTextBlock
+  const block = (diff.origin.toValue || diff.origin.fromValue) as PortableTextTextBlock
 
   const inlineObjects = useMemo(
     () => (diff.origin.toValue ? getInlineObjects(diff.origin) : []),
@@ -52,7 +58,7 @@ export default function PortableText(props: Props): JSX.Element {
 
   const renderChild = useCallback(
     (ptDiffChild: PortableTextChild) => {
-      const spanSchemaType = getChildSchemaType(schemaType.fields, ptDiffChild) as SpanTypeSchema
+      const spanSchemaType = getChildSchemaType(schemaType.fields, ptDiffChild) as SpanSchemaType
       let decoratorTypes: {title: string; value: string}[] = []
       if (spanSchemaType) {
         decoratorTypes = getDecorators(spanSchemaType)
@@ -243,7 +249,7 @@ function renderTextSegment({
   decoratorTypes: {title: string; value: string}[]
   seg: StringDiffSegment
   segIndex: number
-  spanSchemaType: SpanTypeSchema
+  spanSchemaType: SpanSchemaType
 }): JSX.Element {
   // Newlines
   if (seg.text === '\n') {
@@ -257,7 +263,7 @@ function renderTextSegment({
   )
   const spanDiff = child && findSpanDiffFromChild(diff.origin, child)
   // Render decorator diff info
-  const activeMarks = child.marks || []
+  const activeMarks = isPortableTextSpan(child) ? child.marks || [] : []
   if (spanDiff) {
     children = renderDecorators({
       activeMarks,
@@ -303,7 +309,7 @@ function renderDecorators({
   seg: StringDiffSegment
   segIndex: number
   spanDiff: ObjectDiff
-  spanSchemaType: SchemaType
+  spanSchemaType: SpanSchemaType
 }): JSX.Element {
   let returned = <span key={`text-segment-${segIndex}`}>{children}</span>
   const fromPtDiffText: string =
@@ -375,7 +381,7 @@ function renderDecorators({
   return returned
 }
 
-function isEmptyTextChange(block: PortableTextBlock, diff: PortableTextDiff) {
+function isEmptyTextChange(block: PortableTextTextBlock, diff: PortableTextDiff) {
   return (
     block.children.length === 1 &&
     block.children[0]._type === 'span' &&
diff --git a/packages/sanity/src/core/field/types/portableText/diff/helpers.ts b/packages/sanity/src/core/field/types/portableText/diff/helpers.ts
index d8feeff2cc5..512f829b27e 100644
--- a/packages/sanity/src/core/field/types/portableText/diff/helpers.ts
+++ b/packages/sanity/src/core/field/types/portableText/diff/helpers.ts
@@ -1,5 +1,17 @@
 import {flatten, isEqual, orderBy} from 'lodash'
-import {ArraySchemaType, Block, ObjectField, ObjectSchemaType, SchemaType} from '@sanity/types'
+import {
+  ArraySchemaType,
+  isPortableTextSpan,
+  isPortableTextTextBlock,
+  ObjectField,
+  ObjectSchemaType,
+  PortableTextBlock,
+  PortableTextChild,
+  PortableTextObject,
+  PortableTextTextBlock,
+  SchemaType,
+  SpanSchemaType,
+} from '@sanity/types'
 import {
   diff_match_patch as DiffMatchPatch,
   DIFF_DELETE,
@@ -15,14 +27,7 @@ import {
 } from '../../../types'
 import * as TextSymbols from './symbols'
 
-import {
-  InlineSymbolMap,
-  MarkSymbolMap,
-  PortableTextBlock,
-  PortableTextDiff,
-  PortableTextChild,
-  SpanTypeSchema,
-} from './types'
+import {InlineSymbolMap, MarkSymbolMap, PortableTextDiff} from './types'
 
 const dmp = new DiffMatchPatch()
 
@@ -47,7 +52,9 @@ const symbolRegex = new RegExp(`${allSymbols.join('|')}`, 'g')
 const segmentRegex = new RegExp(`${allSymbols.join('|')}|\n`, 'g')
 
 interface BlockSchemaType extends ObjectSchemaType {
-  diffComponent: DiffComponent<ObjectDiff<Block>> | DiffComponentOptions<ObjectDiff<Block>>
+  diffComponent:
+    | DiffComponent<ObjectDiff<PortableTextBlock>>
+    | DiffComponentOptions<ObjectDiff<PortableTextBlock>>
 }
 
 export function isPTSchemaType(schemaType: SchemaType): schemaType is BlockSchemaType {
@@ -55,7 +62,11 @@ export function isPTSchemaType(schemaType: SchemaType): schemaType is BlockSchem
 }
 
 export function isHeader(node: PortableTextBlock): boolean {
-  return !!node.style && ['h1', 'h2', 'h3', 'h4', 'h5', 'h6'].includes(node.style)
+  return (
+    isPortableTextTextBlock(node) &&
+    !!node.style &&
+    ['h1', 'h2', 'h3', 'h4', 'h5', 'h6'].includes(node.style)
+  )
 }
 
 export function findChildDiff(diff: ObjectDiff, child: PortableTextChild): ObjectDiff {
@@ -83,27 +94,27 @@ export function getChildSchemaType(
   return cSchemaType
 }
 
-export function getDecorators(spanSchemaType: SpanTypeSchema): {title: string; value: string}[] {
+export function getDecorators(spanSchemaType: SpanSchemaType): {title: string; value: string}[] {
   if (spanSchemaType.decorators) {
     return orderBy(spanSchemaType.decorators, ['value'], ['asc'])
   }
   return []
 }
 
-export function getAnnotations(spanSchemaType: SpanTypeSchema): ObjectSchemaType[] {
+export function getAnnotations(spanSchemaType: SpanSchemaType): ObjectSchemaType[] {
   if (spanSchemaType.annotations) {
     return orderBy(spanSchemaType.annotations, ['name'], ['asc'])
   }
   return []
 }
 
-export function isDecorator(name: string, schemaType: SpanTypeSchema): boolean {
+export function isDecorator(name: string, schemaType: SpanSchemaType): boolean {
   return getDecorators(schemaType).some((dec) => dec.value === name)
 }
 
 export function blockToSymbolizedText(
   diff: ObjectDiff,
-  block: PortableTextBlock | undefined,
+  block: PortableTextTextBlock | undefined,
   decoratorMap: MarkSymbolMap,
   annotationMap: MarkSymbolMap,
   inlineMap: InlineSymbolMap
@@ -113,8 +124,8 @@ export function blockToSymbolizedText(
   }
   return block.children
     .map((child) => {
-      let returned = child.text?.replace(symbolRegex, '') || '' // Make sure symbols aren't in the text already
-      if (child._type === 'span') {
+      let returned = isPortableTextSpan(child) ? child.text?.replace(symbolRegex, '') : '' // Make sure symbols aren't in the text already
+      if (isPortableTextSpan(child)) {
         // Attatch stringdiff segments
         const spanDiff = findSpanDiffFromChild(diff, child)
         const textDiff = spanDiff?.fields.text
@@ -125,8 +136,8 @@ export function blockToSymbolizedText(
           textDiff.action !== 'unchanged'
         ) {
           returned = textDiff.segments
-            .filter((seg: any) => seg.action !== 'removed')
-            .map((seg: any) => seg.text.replace(symbolRegex, ''))
+            .filter((seg) => seg.action !== 'removed')
+            .map((seg) => seg.text.replace(symbolRegex, ''))
             .join(TextSymbols.SEGMENT_START_SYMBOL)
         }
         if (child.marks) {
@@ -153,8 +164,8 @@ export function createPortableTextDiff(
 ): PortableTextDiff {
   const displayValue =
     diff.action === 'removed'
-      ? (diff.fromValue as PortableTextBlock)
-      : (diff.toValue as PortableTextBlock)
+      ? (diff.fromValue as PortableTextTextBlock)
+      : (diff.toValue as PortableTextTextBlock)
   const _diff: PortableTextDiff = {
     ...diff,
     origin: diff,
@@ -165,7 +176,10 @@ export function createPortableTextDiff(
     const annotationMap: MarkSymbolMap = {}
     const decoratorMap: MarkSymbolMap = {}
     const inlineMap: InlineSymbolMap = {}
-    const spanSchemaType = getChildSchemaType(schemaType.fields, {_key: 'bogus', _type: 'span'})
+    const spanSchemaType = getChildSchemaType(schemaType.fields, {
+      _key: 'bogus',
+      _type: 'span',
+    }) as SpanSchemaType
     if (spanSchemaType) {
       getDecorators(spanSchemaType).forEach((dec, index) => {
         decoratorMap[dec.value] = TextSymbols.DECORATOR_SYMBOLS[index]
@@ -181,14 +195,14 @@ export function createPortableTextDiff(
     })
     const fromText = blockToSymbolizedText(
       _diff.origin,
-      _diff.fromValue as PortableTextBlock,
+      _diff.fromValue as PortableTextTextBlock,
       decoratorMap,
       annotationMap,
       inlineMap
     )
     const toText = blockToSymbolizedText(
       _diff.origin,
-      _diff.toValue as PortableTextBlock,
+      _diff.toValue as PortableTextTextBlock,
       decoratorMap,
       annotationMap,
       inlineMap
@@ -337,7 +351,7 @@ function buildSegments(fromInput: string, toInput: string): StringDiffSegment[]
   )
 }
 
-export function getInlineObjects(diff: ObjectDiff): PortableTextChild[] {
+export function getInlineObjects(diff: ObjectDiff): PortableTextObject[] {
   const allChildren = [
     ...(diff.toValue ? diff.toValue.children.filter((cld: any) => cld._type !== 'span') : []),
   ]
@@ -349,7 +363,7 @@ export function getInlineObjects(diff: ObjectDiff): PortableTextChild[] {
       allChildren.push(oCld)
     }
   })
-  return orderBy(allChildren, ['_key'], ['asc']) as PortableTextChild[]
+  return orderBy(allChildren, ['_key'], ['asc']) as PortableTextObject[]
 }
 
 export function findSpanDiffFromChild(
diff --git a/packages/sanity/src/core/field/types/portableText/diff/types.ts b/packages/sanity/src/core/field/types/portableText/diff/types.ts
index f9d8197d20f..912caf6c1e0 100644
--- a/packages/sanity/src/core/field/types/portableText/diff/types.ts
+++ b/packages/sanity/src/core/field/types/portableText/diff/types.ts
@@ -1,28 +1,11 @@
-import {ObjectSchemaType, SchemaType} from '@sanity/types'
+import {PortableTextTextBlock} from '@sanity/types'
 import {ObjectDiff} from '../../../types'
 
-export type PortableTextBlock = {
-  _key: string
-  _type: string
-  children: PortableTextChild[]
-  markDefs?: {_key: string; _type: string}[]
-  style?: string
+export type PortableTextDiff = ObjectDiff & {
+  displayValue: PortableTextTextBlock
+  origin: ObjectDiff
 }
 
-export type PortableTextChild = {
-  _key: string
-  _type: string
-  marks?: string[]
-  text?: string
-}
-
-export type SpanTypeSchema = SchemaType & {
-  decorators?: {title: string; value: string}[]
-  annotations?: ObjectSchemaType[]
-}
-
-export type PortableTextDiff = ObjectDiff & {displayValue: PortableTextBlock; origin: ObjectDiff}
-
 export type MarkSymbolMap = Record<string, string[]>
 
 export type InlineSymbolMap = Record<string, string>