ΔE 15.5, loose: different enough that you should pick on purpose. Base Flesh is much more saturated, warmer than Pure Filth.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Base Flesh is much more saturated, warmer than Pure Filth.
The same difference applies the other way round: Pure Filth is much more muted, 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 Pure Filth on the colour wheel See Base Flesh on the colour wheel
All matches: Pure Filth equivalents · Base Flesh equivalents