ΔE 11.2, fair: the same colour family, but not a straight swap. Basic Skin Tone is more saturated, cooler than Basic Flesh.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Basic Skin Tone is more saturated, cooler than Basic Flesh.
The same difference applies the other way round: Basic Flesh is more muted, warmer.
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 Basic Flesh on the colour wheel See Basic Skin Tone on the colour wheel
All matches: Basic Flesh equivalents · Basic Skin Tone equivalents