Dead Flesh vs Zombie Flesh

How close are they?

ΔE 9.9, close: similar, with a visible difference side by side. Zombie Flesh is a little darker, warmer than Dead Flesh.

Can I use Zombie Flesh instead of Dead Flesh?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Zombie Flesh is a little darker, warmer than Dead Flesh.

Can I use Dead Flesh instead of Zombie Flesh?

The same difference applies the other way round: Dead Flesh is a little lighter, 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.