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