ΔE 8.7, close: similar, with a visible difference side by side. Iraqi Sand is a little darker, cooler than Barbarian Skin.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Iraqi Sand is a little darker, cooler than Barbarian Skin.
The same difference applies the other way round: Barbarian Skin is a little lighter, 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 Barbarian Skin on the colour wheel See Iraqi Sand on the colour wheel
All matches: Barbarian Skin equivalents · Iraqi Sand equivalents