ΔE 6.4, close: similar, with a visible difference side by side. Mid Soviet Khaki is a little lighter than Olive Drab.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). Mid Soviet Khaki is a little lighter than Olive Drab.
The same difference applies the other way round: Olive Drab 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 Olive Drab on the colour wheel See Mid Soviet Khaki on the colour wheel
All matches: Olive Drab equivalents · Mid Soviet Khaki equivalents