ΔE 18.5, loose: different enough that you should pick on purpose. Desert Brown is a little lighter, much more saturated, warmer than Wasteland Clay.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Desert Brown is a little lighter, much more saturated, warmer than Wasteland Clay.
The same difference applies the other way round: Wasteland Clay is a little darker, much more muted, 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 Brown on the colour wheel
All matches: Wasteland Clay equivalents · Desert Brown equivalents