ΔE 7.9, close: similar, with a visible difference side by side. Catachan Flesh is a little lighter, warmer than Base Flesh.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Catachan Flesh is a little lighter, warmer than Base Flesh.
The same difference applies the other way round: Base Flesh is a little darker, 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 Base Flesh on the colour wheel See Catachan Flesh on the colour wheel
All matches: Base Flesh equivalents · Catachan Flesh equivalents