ΔE 8.6, close: similar, with a visible difference side by side. Desert Yellow is a little darker, warmer than Wasteland Clay.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Desert Yellow is a little darker, warmer than Wasteland Clay.
The same difference applies the other way round: Wasteland Clay is a little lighter, 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 Wasteland Clay on the colour wheel See Desert Yellow on the colour wheel
All matches: Wasteland Clay equivalents · Desert Yellow equivalents