Shin Gunto Gold vs Gold Rush

How close are they?

ΔE 6.7, close: similar, with a visible difference side by side. Gold Rush is a little lighter than Shin Gunto Gold.

Can I use Gold Rush instead of Shin Gunto Gold?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Gold Rush is a little lighter than Shin Gunto Gold.

Can I use Shin Gunto Gold instead of Gold Rush?

The same difference applies the other way round: Shin Gunto Gold 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.