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