ΔE 8.9, close: similar, with a visible difference side by side. Dark Sand is more saturated, warmer than Light Mustard Khaki.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Dark Sand is more saturated, warmer than Light Mustard Khaki.
The same difference applies the other way round: Light Mustard Khaki is 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 Light Mustard Khaki on the colour wheel See Dark Sand on the colour wheel
All matches: Light Mustard Khaki equivalents · Dark Sand equivalents