ΔE 8.0, close: similar, with a visible difference side by side. Barbarian Skin is a little lighter, cooler than Blackert Brown.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Barbarian Skin is a little lighter, cooler than Blackert Brown.
The same difference applies the other way round: Blackert Brown is a little darker, 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 Blackert Brown on the colour wheel See Barbarian Skin on the colour wheel
All matches: Blackert Brown equivalents · Barbarian Skin equivalents