ΔE 7.1, close: similar, with a visible difference side by side. Deep Khaki Drill is a little lighter than MERDC Sand (FS30277).
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Deep Khaki Drill is a little lighter than MERDC Sand (FS30277).
The same difference applies the other way round: MERDC Sand (FS30277) is a little darker.
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 MERDC Sand (FS30277) on the colour wheel See Deep Khaki Drill on the colour wheel
All matches: MERDC Sand (FS30277) equivalents · Deep Khaki Drill equivalents