ΔE 12.8, fair: the same colour family, but not a straight swap. Advanced Flesh Tone is a little lighter, more muted, warmer than Agate Skin.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Advanced Flesh Tone is a little lighter, more muted, warmer than Agate Skin.
The same difference applies the other way round: Agate Skin is a little darker, more saturated, 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 Agate Skin on the colour wheel See Advanced Flesh Tone on the colour wheel
All matches: Agate Skin equivalents · Advanced Flesh Tone equivalents