Brass Scorpion vs Runic Gold

How close are they?

ΔE 15.7, loose: different enough that you should pick on purpose. Runic Gold is much more saturated, cooler than Brass Scorpion.

Can I use Runic Gold instead of Brass Scorpion?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Runic Gold is much more saturated, cooler than Brass Scorpion.

Can I use Brass Scorpion instead of Runic Gold?

The same difference applies the other way round: Brass Scorpion is much more muted, warmer.

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.