ΔE 5.9, very close: most people won’t see a difference side by side. Transparent Brown is more muted, warmer than Sepia Tone. They are different kinds of paint: Army Painter Sepia Tone is a wash/shade and Pro Acryl Transparent Brown 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 6). Transparent Brown is more muted, warmer than Sepia Tone. They are different kinds of paint.
The same difference applies the other way round: Sepia Tone is more saturated, cooler.
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 Sepia Tone on the colour wheel See Transparent Brown on the colour wheel
All matches: Sepia Tone equivalents · Transparent Brown equivalents