Administratum Grey vs Soft Green

How close are they?

ΔE 19.1, loose: different enough that you should pick on purpose. Soft Green is a little lighter, much more saturated than Administratum Grey.

Can I use Soft Green instead of Administratum Grey?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Soft Green is a little lighter, much more saturated than Administratum Grey.

Can I use Administratum Grey instead of Soft Green?

The same difference applies the other way round: Administratum Grey is a little darker, much 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.