ΔE 16.6, loose: different enough that you should pick on purpose. Catachan Flesh is a little darker, warmer than Tanned Flesh.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Catachan Flesh is a little darker, warmer than Tanned Flesh.
The same difference applies the other way round: Tanned 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.
See Tanned Flesh on the colour wheel See Catachan Flesh on the colour wheel
All matches: Tanned Flesh equivalents · Catachan Flesh equivalents