ΔE 15.5, loose: different enough that you should pick on purpose. Pilgrim Grey is a little lighter, more muted than Mocca Skin.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Pilgrim Grey is a little lighter, more muted than Mocca Skin.
The same difference applies the other way round: Mocca Skin is a little darker, more saturated.
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 Mocca Skin on the colour wheel See Pilgrim Grey on the colour wheel
All matches: Mocca Skin equivalents · Pilgrim Grey equivalents