ΔE 8.9, close: similar, with a visible difference side by side. Pallid Wych Flesh is a little lighter, more saturated than RAF Light Aircraft Grey BS381C/627.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Pallid Wych Flesh is a little lighter, more saturated than RAF Light Aircraft Grey BS381C/627.
The same difference applies the other way round: RAF Light Aircraft Grey BS381C/627 is a little 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 RAF Light Aircraft Grey BS381C/627 on the colour wheel See Pallid Wych Flesh on the colour wheel
All matches: RAF Light Aircraft Grey BS381C/627 equivalents · Pallid Wych Flesh equivalents