ΔE 9.2, close: similar, with a visible difference side by side. Trollblood Highlight is a little darker, more saturated, warmer than Pallid Wych Flesh.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Trollblood Highlight is a little darker, more saturated, warmer than Pallid Wych Flesh.
The same difference applies the other way round: Pallid Wych Flesh is a little lighter, more muted, 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 Pallid Wych Flesh on the colour wheel See Trollblood Highlight on the colour wheel
All matches: Pallid Wych Flesh equivalents · Trollblood Highlight equivalents