ΔE 13.4, fair: the same colour family, but not a straight swap. Mahogany Brown is noticeably lighter, more muted than Coffee Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Mahogany Brown is noticeably lighter, more muted than Coffee Brown.
The same difference applies the other way round: Coffee Brown is noticeably darker, more saturated.
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 Coffee Brown on the colour wheel See Mahogany Brown on the colour wheel
All matches: Coffee Brown equivalents · Mahogany Brown equivalents