ΔE 8.1, close: similar, with a visible difference side by side. Diarylide Yellow is a little lighter, more saturated than Iyanden Yellow. They are different kinds of paint: Citadel Iyanden Yellow is a one-coat contrast-style paint and Golden Diarylide Yellow is an opaque base/layer paint, 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 8). Diarylide Yellow is a little lighter, more saturated than Iyanden Yellow. They are different kinds of paint.
The same difference applies the other way round: Iyanden Yellow is a little darker, 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 Iyanden Yellow on the colour wheel See Diarylide Yellow on the colour wheel
All matches: Iyanden Yellow equivalents · Diarylide Yellow equivalents