Ryza Rust vs Golden Brown

How close are they?

ΔE 8.3, close: similar, with a visible difference side by side. Golden Brown is a little darker than Ryza Rust.

Can I use Golden Brown instead of Ryza Rust?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Golden Brown is a little darker than Ryza Rust.

Can I use Ryza Rust instead of Golden Brown?

The same difference applies the other way round: Ryza Rust is a little lighter.

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.