ΔE 12.7, fair: the same colour family, but not a straight swap. Alizarin Crimson Hue is more saturated, cooler than Chaotic Red.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Alizarin Crimson Hue is more saturated, cooler than Chaotic Red.
The same difference applies the other way round: Chaotic Red is 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 Chaotic Red on the colour wheel See Alizarin Crimson Hue on the colour wheel
All matches: Chaotic Red equivalents · Alizarin Crimson Hue equivalents