ΔE 7.7, close: similar, with a visible difference side by side. USN Light Ghost Grey is a little lighter, more saturated than Administratum Grey.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). USN Light Ghost Grey is a little lighter, more saturated than Administratum Grey.
The same difference applies the other way round: Administratum Grey is a little darker, 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 USN Light Ghost Grey on the colour wheel
All matches: Administratum Grey equivalents · USN Light Ghost Grey equivalents