ΔE 13.5, fair: the same colour family, but not a straight swap. Red Brown 2 is a little darker, 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 14). Red Brown 2 is a little darker, more muted, warmer than Fur Brown.
The same difference applies the other way round: Fur Brown is a little lighter, 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 Red Brown 2 on the colour wheel
All matches: Fur Brown equivalents · Red Brown 2 equivalents