ΔE 7.8, close: similar, with a visible difference side by side. Medium Gray is more saturated than Administratum Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Medium Gray is more saturated than Administratum Grey.
The same difference applies the other way round: Administratum Grey 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 Administratum Grey on the colour wheel See Medium Gray on the colour wheel
All matches: Administratum Grey equivalents · Medium Gray equivalents