Bestigor Flesh vs Gun Corps Brown

How close are they?

ΔE 23.1, loose: different enough that you should pick on purpose. Gun Corps Brown is noticeably darker, cooler than Bestigor Flesh.

Can I use Gun Corps Brown instead of Bestigor Flesh?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Gun Corps Brown is noticeably darker, cooler than Bestigor Flesh.

Can I use Bestigor Flesh instead of Gun Corps Brown?

The same difference applies the other way round: Bestigor Flesh is noticeably lighter, 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.