ΔE 20.5, loose: different enough that you should pick on purpose. Yellow Sand is noticeably lighter, more muted, cooler than Desert Skin.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Yellow Sand is noticeably lighter, more muted, cooler than Desert Skin.
The same difference applies the other way round: Desert Skin is noticeably darker, more saturated, 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 Desert Skin on the colour wheel See Yellow Sand on the colour wheel
All matches: Desert Skin equivalents · Yellow Sand equivalents