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