ΔE 13.7, fair: the same colour family, but not a straight swap. Ardennes Green is more muted, cooler than Mid Soviet Khaki.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Ardennes Green is more muted, cooler than Mid Soviet Khaki.
The same difference applies the other way round: Mid Soviet Khaki is more saturated, warmer.
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 Ardennes Green on the colour wheel
All matches: Mid Soviet Khaki equivalents · Ardennes Green equivalents