ΔE 9.2, close: similar, with a visible difference side by side. Medium Grey is a little lighter, warmer than Bestial Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Medium Grey is a little lighter, warmer than Bestial Green.
The same difference applies the other way round: Bestial Green 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 Bestial Green on the colour wheel See Medium Grey on the colour wheel
All matches: Bestial Green equivalents · Medium Grey equivalents