Flayed One Flesh vs Peach Flesh

How close are they?

ΔE 8.8, close: similar, with a visible difference side by side. Peach Flesh is a little lighter, more saturated than Flayed One Flesh.

Can I use Peach Flesh instead of Flayed One Flesh?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Peach Flesh is a little lighter, more saturated than Flayed One Flesh.

Can I use Flayed One Flesh instead of Peach Flesh?

The same difference applies the other way round: Flayed One Flesh is a little darker, 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.