ΔE 9.7, close: similar, with a visible difference side by side. Dark Red is a little lighter, cooler than Brown Leather.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Dark Red is a little lighter, cooler than Brown Leather.
The same difference applies the other way round: Brown Leather 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 Brown Leather on the colour wheel See Dark Red on the colour wheel
All matches: Brown Leather equivalents · Dark Red equivalents