ΔE 14.5, fair: the same colour family, but not a straight swap. Gorthor Brown is noticeably darker, more saturated than Mocca Skin.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Gorthor Brown is noticeably darker, more saturated than Mocca Skin.
The same difference applies the other way round: Mocca Skin is noticeably lighter, more muted.
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 Mocca Skin on the colour wheel See Gorthor Brown on the colour wheel
All matches: Mocca Skin equivalents · Gorthor Brown equivalents