ΔE 6.2, close: similar, with a visible difference side by side. BS Med. Sea Grey is a little darker than Administratum Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 6). BS Med. Sea Grey is a little darker than Administratum Grey.
The same difference applies the other way round: Administratum Grey is a little lighter.
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 BS Med. Sea Grey on the colour wheel
All matches: Administratum Grey equivalents · BS Med. Sea Grey equivalents