ΔE 7.3, close: similar, with a visible difference side by side. Russian AF Grey N.4 is more saturated than Combat Fatigues.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Russian AF Grey N.4 is more saturated than Combat Fatigues.
The same difference applies the other way round: Combat Fatigues is more muted.
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 Combat Fatigues on the colour wheel See Russian AF Grey N.4 on the colour wheel
All matches: Combat Fatigues equivalents · Russian AF Grey N.4 equivalents