ΔE 9.3, close: similar, with a visible difference side by side. Medium Gray is a little darker, more muted, cooler than Fenrisian Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Medium Gray is a little darker, more muted, cooler than Fenrisian Grey.
The same difference applies the other way round: Fenrisian Grey is a little lighter, 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 Fenrisian Grey on the colour wheel See Medium Gray on the colour wheel
All matches: Fenrisian Grey equivalents · Medium Gray equivalents