ΔE 9.2, close: similar, with a visible difference side by side. Petroleum Brown is a little darker, cooler than Desert Skin.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Petroleum Brown is a little darker, cooler than Desert Skin.
The same difference applies the other way round: Desert 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 Desert Skin on the colour wheel See Petroleum Brown on the colour wheel
All matches: Desert Skin equivalents · Petroleum Brown equivalents