ΔE 14.2, fair: the same colour family, but not a straight swap. Knight-Questor Flesh is noticeably darker, warmer than Topaz Skin.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Knight-Questor Flesh is noticeably darker, warmer than Topaz Skin.
The same difference applies the other way round: Topaz Skin is noticeably lighter, 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 Topaz Skin on the colour wheel See Knight-Questor Flesh on the colour wheel
All matches: Topaz Skin equivalents · Knight-Questor Flesh equivalents