ΔE 4.3, very close: most people won’t see a difference side by side. Flayed One Flesh is a little lighter than Matt Sepia. They are different kinds of paint: AMMO by Mig Matt Sepia is an ink, glaze or transparent paint and Citadel Flayed One Flesh is an opaque base/layer 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 4). Flayed One Flesh is a little lighter than Matt Sepia. They are different kinds of paint.
The same difference applies the other way round: Matt Sepia is a little darker.
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 Matt Sepia on the colour wheel See Flayed One Flesh on the colour wheel
All matches: Matt Sepia equivalents · Flayed One Flesh equivalents