ΔE 3.8, very close: most people won’t see a difference side by side. Iridescent Gold Deep (Fine) is a little lighter than Castellax Bronze. They are different kinds of paint: Citadel Castellax Bronze is a metallic and Golden Iridescent Gold Deep (Fine) is a pearl paint, so they won’t behave the same on the model even where the colour is close.
Yes, for most jobs. Very close match (ΔE 4). Iridescent Gold Deep (Fine) is a little lighter than Castellax Bronze. They are different kinds of paint.
The same difference applies the other way round: Castellax Bronze 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.
See Castellax Bronze on the colour wheel See Iridescent Gold Deep (Fine) on the colour wheel
All matches: Castellax Bronze equivalents · Iridescent Gold Deep (Fine) equivalents