Retributor Armour vs Gold Rush

How close are they?

ΔE 9.2, close: similar, with a visible difference side by side. Gold Rush is a little lighter, more muted than Retributor Armour.

Can I use Gold Rush instead of Retributor Armour?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Gold Rush is a little lighter, more muted than Retributor Armour.

Can I use Retributor Armour instead of Gold Rush?

The same difference applies the other way round: Retributor Armour is a little darker, 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.