ΔE 8.1, close: similar, with a visible difference side by side. Russian AF Grey N.4 is a little darker, more saturated, cooler than Beige Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Russian AF Grey N.4 is a little darker, more saturated, cooler than Beige Grey.
The same difference applies the other way round: Beige Grey is a little lighter, more muted, 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 Beige Grey on the colour wheel See Russian AF Grey N.4 on the colour wheel
All matches: Beige Grey equivalents · Russian AF Grey N.4 equivalents