ΔE 8.9, close: similar, with a visible difference side by side. Warpstone Glow is a little darker, more muted than Green Fluor. They are different kinds of paint: AK Interactive Green Fluor is a fluorescent or effect paint and Citadel Warpstone Glow 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 9). Warpstone Glow is a little darker, more muted than Green Fluor. They are different kinds of paint.
The same difference applies the other way round: Green Fluor is a little lighter, 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 Green Fluor on the colour wheel See Warpstone Glow on the colour wheel
All matches: Green Fluor equivalents · Warpstone Glow equivalents