ΔE 7.4, close: similar, with a visible difference side by side. Khaki Grey is a little lighter, warmer than Mid Soviet Khaki.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Khaki Grey is a little lighter, warmer than Mid Soviet Khaki.
The same difference applies the other way round: Mid Soviet Khaki 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 Mid Soviet Khaki on the colour wheel See Khaki Grey on the colour wheel
All matches: Mid Soviet Khaki equivalents · Khaki Grey equivalents