ΔE 18.1, loose: different enough that you should pick on purpose. Ghost Green is a little lighter, much more saturated, cooler than Pallid Wych Flesh.
✓ Herrick Games paint comparison chart lists these two as equivalents.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Ghost Green is a little lighter, much more saturated, cooler than Pallid Wych Flesh.
The same difference applies the other way round: Pallid Wych Flesh is a little darker, much more muted, 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 Pallid Wych Flesh on the colour wheel See Ghost Green on the colour wheel
All matches: Pallid Wych Flesh equivalents · Ghost Green equivalents