ΔE 10.9, fair: the same colour family, but not a straight swap. Charred Brown is noticeably lighter, cooler than Brown Leather.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Charred Brown is noticeably lighter, cooler than Brown Leather.
The same difference applies the other way round: Brown Leather is noticeably 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 Charred Brown on the colour wheel
All matches: Brown Leather equivalents · Charred Brown equivalents