ΔE 13.5, fair: the same colour family, but not a straight swap. Beaten Purple is noticeably darker, warmer than Alien Purple.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Beaten Purple is noticeably darker, warmer than Alien Purple.
The same difference applies the other way round: Alien Purple is noticeably lighter, 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 Alien Purple on the colour wheel See Beaten Purple on the colour wheel
All matches: Alien Purple equivalents · Beaten Purple equivalents