ΔE 29.0, loose: different enough that you should pick on purpose. Zombie Skin is much more muted, warmer than Gutrippa Flesh.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 29). Zombie Skin is much more muted, warmer than Gutrippa Flesh.
The same difference applies the other way round: Gutrippa Flesh is much more saturated, 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.
See Gutrippa Flesh on the colour wheel See Zombie Skin on the colour wheel
All matches: Gutrippa Flesh equivalents · Zombie Skin equivalents