ΔE 9.4, close: similar, with a visible difference side by side. US Desert Sand is a little darker, warmer than Command Khaki.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). US Desert Sand is a little darker, warmer than Command Khaki.
The same difference applies the other way round: Command Khaki 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 Command Khaki on the colour wheel See US Desert Sand on the colour wheel
All matches: Command Khaki equivalents · US Desert Sand equivalents