ΔE 16.1, loose: different enough that you should pick on purpose. Cork Brown is a little lighter, much more muted, cooler than Catachan Flesh.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Cork Brown is a little lighter, much more muted, cooler than Catachan Flesh.
The same difference applies the other way round: Catachan Flesh is a little darker, much more saturated, 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.
See Catachan Flesh on the colour wheel See Cork Brown on the colour wheel
All matches: Catachan Flesh equivalents · Cork Brown equivalents