ΔE 7.8, close: similar, with a visible difference side by side. Khaki Brown is a little darker than Wasteland Clay.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Khaki Brown is a little darker than Wasteland Clay.
The same difference applies the other way round: Wasteland Clay 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 Wasteland Clay on the colour wheel See Khaki Brown on the colour wheel
All matches: Wasteland Clay equivalents · Khaki Brown equivalents