ΔE 6.3, close: similar, with a visible difference side by side. Fluorescent Orange-Yellow is more muted than Yriel Yellow. They are different kinds of paint: Citadel Yriel Yellow is an opaque base/layer paint and Golden Fluorescent Orange-Yellow is a fluorescent or effect 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 6). Fluorescent Orange-Yellow is more muted than Yriel Yellow. They are different kinds of paint.
The same difference applies the other way round: Yriel Yellow is more saturated.
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 Yriel Yellow on the colour wheel See Fluorescent Orange-Yellow on the colour wheel
All matches: Yriel Yellow equivalents · Fluorescent Orange-Yellow equivalents