diff --git a/go/cmd/dolt/commands/diff.go b/go/cmd/dolt/commands/diff.go
index dba0b8d481..cfb347e0ba 100644
--- a/go/cmd/dolt/commands/diff.go
+++ b/go/cmd/dolt/commands/diff.go
@@ -403,7 +403,7 @@ func diffUserTables(ctx context.Context, dEnv *env.DoltEnv, dArgs *diffArgs) (ve
 
 		if dArgs.diffParts&Summary != 0 {
 			numCols := fromSch.GetAllCols().Size()
-			verr = diffSummary(ctx, td, numCols)
+			verr = printNomsDiffSummary(ctx, td, numCols)
 		}
 
 		if dArgs.diffParts&SchemaOnlyDiff != 0 {
@@ -836,7 +836,7 @@ func printTableDiffSummary(td diff.TableDelta) {
 	}
 }
 
-func diffSummary(ctx context.Context, td diff.TableDelta, colLen int) errhand.VerboseError {
+func printNomsDiffSummary(ctx context.Context, td diff.TableDelta, colLen int) errhand.VerboseError {
 	// todo: use errgroup.Group
 	ae := atomicerr.New()
 	ch := make(chan diff.DiffSummaryProgress)
diff --git a/go/libraries/doltcore/diff/diff_summary.go b/go/libraries/doltcore/diff/diff_summary.go
index ae590e76e3..b3b68621ec 100644
--- a/go/libraries/doltcore/diff/diff_summary.go
+++ b/go/libraries/doltcore/diff/diff_summary.go
@@ -103,6 +103,7 @@ func nomsSummary(ctx context.Context, ch chan DiffSummaryProgress, from, to dura
 	return nil
 }
 
+// SummaryForTableDelta pushes diff summary progress messages for the table delta given to the channel given
 func SummaryForTableDelta(ctx context.Context, ch chan DiffSummaryProgress, td TableDelta) error {
 	fromSch, toSch, err := td.GetSchemas(ctx)
 	if err != nil {
@@ -118,23 +119,50 @@ func SummaryForTableDelta(ctx context.Context, ch chan DiffSummaryProgress, td T
 		return err
 	}
 
-	fromRows, toRows, err := td.GetMaps(ctx)
+	fromRows, toRows, err := td.GetRowData(ctx)
 	if err != nil {
 		return err
 	}
 
+	if types.IsFormat_DOLT_1(td.Format()) {
+		if keyless {
+			return fmt.Errorf("keyless diff not supported for format %s", td.Format().VersionString())
+		}
+		return diffProllyTrees(ctx, ch, durable.ProllyMapFromIndex(fromRows), durable.ProllyMapFromIndex(toRows))
+	} else {
+		return diffNomsMaps(ctx, ch, keyless, fromRows, toRows)
+	}
+}
+
+func diffNomsMaps(ctx context.Context, ch chan DiffSummaryProgress, keyless bool, fromRows durable.Index, toRows durable.Index) error {
 	var rpr reporter
 	if keyless {
 		rpr = reportKeylessChanges
 	} else {
 		rpr = reportNomsPkChanges
 		ch <- DiffSummaryProgress{
-			OldSize: fromRows.Len(),
-			NewSize: toRows.Len(),
+			OldSize: fromRows.Count(),
+			NewSize: toRows.Count(),
 		}
 	}
 
-	return summaryWithReporter(ctx, ch, fromRows, toRows, rpr)
+	return summaryWithReporter(ctx, ch, durable.NomsMapFromIndex(fromRows), durable.NomsMapFromIndex(toRows), rpr)
+}
+
+func diffProllyTrees(ctx context.Context, ch chan DiffSummaryProgress, from, to prolly.Map) error {
+	diffSummary, err := prolly.DiffMapSummary(ctx, from, to)
+	if err != nil {
+		return err
+	}
+	ch <- DiffSummaryProgress{
+		Adds:        diffSummary.Adds,
+		Removes:     diffSummary.Removes,
+		Changes:     diffSummary.Changes,
+		CellChanges: diffSummary.CellChanges,
+		NewSize:     diffSummary.NewSize,
+		OldSize:     diffSummary.OldSize,
+	}
+	return nil
 }
 
 func summaryWithReporter(ctx context.Context, ch chan DiffSummaryProgress, from, to types.Map, rpr reporter) (err error) {
diff --git a/go/libraries/doltcore/diff/table_deltas.go b/go/libraries/doltcore/diff/table_deltas.go
index 1575991fd0..dde93c9b0c 100644
--- a/go/libraries/doltcore/diff/table_deltas.go
+++ b/go/libraries/doltcore/diff/table_deltas.go
@@ -19,6 +19,7 @@ import (
 	"fmt"
 	"sort"
 
+	"github.com/dolthub/dolt/go/libraries/doltcore/doltdb/durable"
 	"github.com/dolthub/dolt/go/libraries/utils/set"
 
 	"github.com/dolthub/dolt/go/libraries/doltcore/doltdb"
@@ -309,6 +310,14 @@ func (td TableDelta) GetSchemas(ctx context.Context) (from, to schema.Schema, er
 	return td.FromSch, td.ToSch, nil
 }
 
+// Format returns the format of the tables in this delta.
+func (td TableDelta) Format() *types.NomsBinFormat {
+	if td.FromTable != nil {
+		return td.FromTable.Format()
+	}
+	return td.ToTable.Format()
+}
+
 func (td TableDelta) IsKeyless(ctx context.Context) (bool, error) {
 	f, t, err := td.GetSchemas(ctx)
 	if err != nil {
@@ -326,7 +335,8 @@ func (td TableDelta) IsKeyless(ctx context.Context) (bool, error) {
 	}
 }
 
-// GetMaps returns the table's row map at the fromRoot and toRoot, or and empty map if the table did not exist.
+// GetMaps returns the table's row map at the fromRoot and toRoot, or an empty map if the table did not exist.
+// Deprecated: only compatible with LD1 storage format. Use GetRowData instead
 func (td TableDelta) GetMaps(ctx context.Context) (from, to types.Map, err error) {
 	if td.FromTable != nil {
 		from, err = td.FromTable.GetNomsRowData(ctx)
@@ -349,6 +359,31 @@ func (td TableDelta) GetMaps(ctx context.Context) (from, to types.Map, err error
 	return from, to, nil
 }
 
+// GetRowData returns the table's row data at the fromRoot and toRoot, or an empty map if the table did not exist.
+func (td TableDelta) GetRowData(ctx context.Context) (from, to durable.Index, err error) {
+	if td.FromTable != nil {
+		from, err = td.FromTable.GetRowData(ctx)
+		if err != nil {
+			return from, to, err
+		}
+	} else {
+		// TODO: need a different schema here?
+		from, _ = durable.NewEmptyIndex(ctx, td.ToTable.ValueReadWriter(), td.FromSch)
+	}
+
+	if td.ToTable != nil {
+		to, err = td.ToTable.GetRowData(ctx)
+		if err != nil {
+			return from, to, err
+		}
+	} else {
+		// TODO: need a different schema here?
+		to, _ = durable.NewEmptyIndex(ctx, td.FromTable.ValueReadWriter(), td.ToSch)
+	}
+
+	return from, to, nil
+}
+
 func fkSlicesAreEqual(from, to []doltdb.ForeignKey) bool {
 	if len(from) != len(to) {
 		return false