ΔE 12.5, fair: the same colour family, but not a straight swap. Fluorescent Red is a little lighter, more saturated, cooler than Baal Red. They are different kinds of paint: Citadel Baal Red is a one-coat contrast-style paint and Vallejo Fluorescent Red is a fluorescent or effect 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). Fluorescent Red is a little lighter, more saturated, cooler than Baal Red. They are different kinds of paint.
The same difference applies the other way round: Baal Red is a little 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 Baal Red on the colour wheel See Fluorescent Red on the colour wheel
All matches: Baal Red equivalents · Fluorescent Red equivalents