ΔE 17.4, loose: different enough that you should pick on purpose. Acid Green is noticeably darker, cooler than Desolate Brown.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Acid Green is noticeably darker, cooler than Desolate Brown.
The same difference applies the other way round: Desolate Brown is noticeably lighter, 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 Desolate Brown on the colour wheel See Acid Green on the colour wheel
All matches: Desolate Brown equivalents · Acid Green equivalents