ΔE 15.9, loose: different enough that you should pick on purpose. Khaki Drill is a little darker, more muted than Fyreslayer Flesh.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Khaki Drill is a little darker, more muted than Fyreslayer Flesh.
The same difference applies the other way round: Fyreslayer Flesh is a little lighter, more saturated.
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 Khaki Drill on the colour wheel
All matches: Fyreslayer Flesh equivalents · Khaki Drill equivalents