ΔE 11.4, fair: the same colour family, but not a straight swap. Interference Green (Fine) is noticeably lighter than Fairy Dust. They are different kinds of paint: Army Painter Fairy Dust is a metallic and Golden Interference Green (Fine) is a pearl paint, so they won’t behave the same on the model even where the colour is close.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 11). Interference Green (Fine) is noticeably lighter than Fairy Dust. They are different kinds of paint.
The same difference applies the other way round: Fairy Dust is noticeably 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 Fairy Dust on the colour wheel See Interference Green (Fine) on the colour wheel
All matches: Fairy Dust equivalents · Interference Green (Fine) equivalents