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