Orc Skin vs Gutrippa Flesh

How close are they?

ΔE 28.4, loose: different enough that you should pick on purpose. Gutrippa Flesh is noticeably lighter, much more muted, warmer than Orc Skin.

Can I use Gutrippa Flesh instead of Orc Skin?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 28). Gutrippa Flesh is noticeably lighter, much more muted, warmer than Orc Skin.

Can I use Orc Skin instead of Gutrippa Flesh?

The same difference applies the other way round: Orc Skin is noticeably darker, 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.