ΔE 9.9, close: similar, with a visible difference side by side. Imperial Gold is more saturated than Iridescent Gold (Coarse). They are different kinds of paint: Golden Iridescent Gold (Coarse) is a pearl paint and Vallejo Imperial Gold is a metallic, so they won’t behave the same on the model even where the colour is close.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Imperial Gold is more saturated than Iridescent Gold (Coarse). They are different kinds of paint.
The same difference applies the other way round: Iridescent Gold (Coarse) is more muted.
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 Iridescent Gold (Coarse) on the colour wheel See Imperial Gold on the colour wheel
All matches: Iridescent Gold (Coarse) equivalents · Imperial Gold equivalents