Soft Tone vs Seraphim Sepia

How close are they?

ΔE 26.3, loose: different enough that you should pick on purpose. Seraphim Sepia is noticeably lighter, cooler than Soft Tone.

✓ Two Thin Coats comparison chart lists these two as equivalents.

Can I use Seraphim Sepia instead of Soft Tone?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 26). Seraphim Sepia is noticeably lighter, cooler than Soft Tone.

Can I use Soft Tone instead of Seraphim Sepia?

The same difference applies the other way round: Soft Tone is noticeably darker, warmer.

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.