ΔE 5.2, very close: most people won’t see a difference side by side. Administratum Grey is more muted than Dark Ghost Grey FS 36320.
Can I use Administratum Grey instead of Dark Ghost Grey FS 36320?
Yes, for most jobs. Very close match (ΔE 5). Administratum Grey is more muted than Dark Ghost Grey FS 36320.
Can I use Dark Ghost Grey FS 36320 instead of Administratum Grey?
The same difference applies the other way round: Dark Ghost Grey FS 36320 is more saturated.
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.