ΔE 9.7, close: similar, with a visible difference side by side. Desert Yellow is a little darker than Sand Yellow.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Desert Yellow is a little darker than Sand Yellow.
The same difference applies the other way round: Sand Yellow is a little lighter.
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 Sand Yellow on the colour wheel See Desert Yellow on the colour wheel
All matches: Sand Yellow equivalents · Desert Yellow equivalents