ΔE 11.8, fair: the same colour family, but not a straight swap. Pink Horror is more saturated, warmer than Magenta.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Pink Horror is more saturated, warmer than Magenta.
The same difference applies the other way round: Magenta is more muted, cooler.
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 Magenta on the colour wheel See Pink Horror on the colour wheel
All matches: Magenta equivalents · Pink Horror equivalents