ΔE 14.5, fair: the same colour family, but not a straight swap. Warpstone Glow is noticeably darker than Luminous Green INK. They are different kinds of paint: AK Interactive Luminous Green INK is an ink, glaze or transparent 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.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Warpstone Glow is noticeably darker than Luminous Green INK. They are different kinds of paint.
The same difference applies the other way round: Luminous Green INK is noticeably lighter.
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 Luminous Green INK on the colour wheel See Warpstone Glow on the colour wheel
All matches: Luminous Green INK equivalents · Warpstone Glow equivalents