ΔE 11.6, fair: the same colour family, but not a straight swap. Flat Earth is a little darker, more muted than Rawhide Brown.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Flat Earth is a little darker, more muted than Rawhide Brown.
The same difference applies the other way round: Rawhide Brown is a little 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 Rawhide Brown on the colour wheel See Flat Earth on the colour wheel
All matches: Rawhide Brown equivalents · Flat Earth equivalents