ΔE 12.9, fair: the same colour family, but not a straight swap. Doomfire Magenta is a little darker, more muted than Pink Fluor. They are different kinds of paint: AK Interactive Pink Fluor is a fluorescent or effect paint and Citadel Doomfire Magenta is a one-coat contrast-style 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 13). Doomfire Magenta is a little darker, more muted than Pink Fluor. They are different kinds of paint.
The same difference applies the other way round: Pink 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 Pink Fluor on the colour wheel See Doomfire Magenta on the colour wheel
All matches: Pink Fluor equivalents · Doomfire Magenta equivalents