ΔE 13.6, fair: the same colour family, but not a straight swap. Forbidden Fruit is noticeably lighter, more saturated, cooler than Purple INK. They are different kinds of paint: AK Interactive Purple INK is an ink, glaze or transparent paint and Army Painter Forbidden Fruit 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). Forbidden Fruit is noticeably lighter, more saturated, cooler than Purple INK. They are different kinds of paint.
The same difference applies the other way round: Purple INK is noticeably darker, more muted, warmer.
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 Purple INK on the colour wheel See Forbidden Fruit on the colour wheel
All matches: Purple INK equivalents · Forbidden Fruit equivalents