ΔE 6.5, close: similar, with a visible difference side by side. Light Khaki Drill is a little lighter, warmer than Light Olive Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Light Khaki Drill is a little lighter, warmer than Light Olive Green.
The same difference applies the other way round: Light Olive Green is a little darker, 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 Olive Green on the colour wheel See Light Khaki Drill on the colour wheel
All matches: Light Olive Green equivalents · Light Khaki Drill equivalents