ΔE 13.9, fair: the same colour family, but not a straight swap. Spiritstone Red is a little darker, more saturated than Candy Red. They are different kinds of paint: AMMO by Mig Candy Red is an ink, glaze or transparent paint and Citadel Spiritstone Red is a technical paint or medium, 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). Spiritstone Red is a little darker, more saturated than Candy Red. They are different kinds of paint.
The same difference applies the other way round: Candy Red is a little lighter, more muted.
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 Candy Red on the colour wheel See Spiritstone Red on the colour wheel
All matches: Candy Red equivalents · Spiritstone Red equivalents