ΔE 8.9, close: similar, with a visible difference side by side. Camoufl age Brown is a little darker, more muted than Pure Filth.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Camoufl age Brown is a little darker, more muted than Pure Filth.
The same difference applies the other way round: Pure Filth is a little lighter, more saturated.
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 Camoufl age Brown on the colour wheel
All matches: Pure Filth equivalents · Camoufl age Brown equivalents