ΔE 17.6, loose: different enough that you should pick on purpose. Copper Brown is a little darker, much more muted than Goth Skin.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Copper Brown is a little darker, much more muted than Goth Skin.
The same difference applies the other way round: Goth Skin is a little lighter, much 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 Goth Skin on the colour wheel See Copper Brown on the colour wheel
All matches: Goth Skin equivalents · Copper Brown equivalents