ΔE 16.8, loose: different enough that you should pick on purpose. Menoth White Highlight is noticeably lighter, more saturated than Pallid Wych Flesh.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Menoth White Highlight is noticeably lighter, more saturated than Pallid Wych Flesh.
The same difference applies the other way round: Pallid Wych Flesh is noticeably darker, more muted.
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 Menoth White Highlight on the colour wheel
All matches: Pallid Wych Flesh equivalents · Menoth White Highlight equivalents