ΔE 10.6, fair: the same colour family, but not a straight swap. Basic Skin Tone is a little lighter, more saturated than Warm Skin.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Basic Skin Tone is a little lighter, more saturated than Warm Skin.
The same difference applies the other way round: Warm Skin is a little darker, 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 Warm Skin on the colour wheel See Basic Skin Tone on the colour wheel
All matches: Warm Skin equivalents · Basic Skin Tone equivalents