Resurrection Flesh vs Barbarian Skin

How close are they?

ΔE 6.5, close: similar, with a visible difference side by side. Barbarian Skin is more saturated, cooler than Resurrection Flesh.

Can I use Barbarian Skin instead of Resurrection Flesh?

Usually, if you are not matching paint already on the model. Close match (ΔE 6). Barbarian Skin is more saturated, cooler than Resurrection Flesh.

Can I use Resurrection Flesh instead of Barbarian Skin?

The same difference applies the other way round: Resurrection Flesh is more muted, 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.