ΔE 4.8, very close: most people won’t see a difference side by side. Transparent Sepia is more saturated than Balthasar Gold. They are different kinds of paint: Citadel Balthasar Gold is a metallic and Green Stuff World Transparent Sepia is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.
Yes, for most jobs. Very close match (ΔE 5). Transparent Sepia is more saturated than Balthasar Gold. They are different kinds of paint.
The same difference applies the other way round: Balthasar Gold is more muted.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Balthasar Gold on the colour wheel See Transparent Sepia on the colour wheel
All matches: Balthasar Gold equivalents · Transparent Sepia equivalents