ΔE 13.5, fair: the same colour family, but not a straight swap. Leather Brown is noticeably darker, more muted than Arrakis Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Leather Brown is noticeably darker, more muted than Arrakis Brown.
The same difference applies the other way round: Arrakis Brown is noticeably lighter, 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 Arrakis Brown on the colour wheel See Leather Brown on the colour wheel
All matches: Arrakis Brown equivalents · Leather Brown equivalents