ΔE 8.5, close: similar, with a visible difference side by side. Skin Tone is a little lighter than Gnome Flesh.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Skin Tone is a little lighter than Gnome Flesh.
The same difference applies the other way round: Gnome Flesh is a little darker.
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 Gnome Flesh on the colour wheel See Skin Tone on the colour wheel
All matches: Gnome Flesh equivalents · Skin Tone equivalents