Superhero Red vs Sanctuary Red

How close are they?

ΔE 6.1, close: similar, with a visible difference side by side. Sanctuary Red is a little lighter than Superhero Red.

Can I use Sanctuary Red instead of Superhero Red?

Usually, if you are not matching paint already on the model. Close match (ΔE 6). Sanctuary Red is a little lighter than Superhero Red.

Can I use Superhero Red instead of Sanctuary Red?

The same difference applies the other way round: Superhero Red is a little darker.

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.