Brass vs Brass Scorpion

How close are they?

ΔE 20.6, loose: different enough that you should pick on purpose. Brass Scorpion is noticeably darker, much more saturated than Brass.

Can I use Brass Scorpion instead of Brass?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 21). Brass Scorpion is noticeably darker, much more saturated than Brass.

Can I use Brass instead of Brass Scorpion?

The same difference applies the other way round: Brass is noticeably lighter, 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.