ΔE 8.7, close: similar, with a visible difference side by side. Purple is a little lighter, more muted, warmer than Alien Purple.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Purple is a little lighter, more muted, warmer than Alien Purple.
The same difference applies the other way round: Alien Purple is a little darker, more saturated, 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 Purple on the colour wheel
All matches: Alien Purple equivalents · Purple equivalents