ΔE 13.2, fair: the same colour family, but not a straight swap. Gorthor Brown is a little darker, more saturated, warmer than Dark Flesh.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Gorthor Brown is a little darker, more saturated, warmer than Dark Flesh.
The same difference applies the other way round: Dark Flesh is a little lighter, more muted, 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 Dark Flesh on the colour wheel See Gorthor Brown on the colour wheel
All matches: Dark Flesh equivalents · Gorthor Brown equivalents