ΔE 19.6, loose: different enough that you should pick on purpose. Earth Brown is noticeably darker, more muted, warmer than Mid Khaki Drill.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Earth Brown is noticeably darker, more muted, warmer than Mid Khaki Drill.
The same difference applies the other way round: Mid Khaki Drill is noticeably 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 Mid Khaki Drill on the colour wheel See Earth Brown on the colour wheel
All matches: Mid Khaki Drill equivalents · Earth Brown equivalents