ΔE 10.3, fair: the same colour family, but not a straight swap. Leather Brown is a little lighter, warmer than Clear Smoke.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 10). Leather Brown is a little lighter, warmer than Clear Smoke.
The same difference applies the other way round: Clear Smoke is a little darker, cooler.
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 Clear Smoke on the colour wheel See Leather Brown on the colour wheel
All matches: Clear Smoke equivalents · Leather Brown equivalents