ΔE 23.3, loose: different enough that you should pick on purpose. Khardic Flesh is a little lighter, much more muted, warmer than Astorath Red.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Khardic Flesh is a little lighter, much more muted, warmer than Astorath Red.
The same difference applies the other way round: Astorath Red is a little darker, much 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 Astorath Red on the colour wheel See Khardic Flesh on the colour wheel
All matches: Astorath Red equivalents · Khardic Flesh equivalents