ΔE 7.3, close: similar, with a visible difference side by side. Basic Skin Tone is more saturated, warmer than Tourmaline Skin.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Basic Skin Tone is more saturated, warmer than Tourmaline Skin.
The same difference applies the other way round: Tourmaline Skin is 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 Tourmaline Skin on the colour wheel See Basic Skin Tone on the colour wheel
All matches: Tourmaline Skin equivalents · Basic Skin Tone equivalents