ΔE 15.1, loose: different enough that you should pick on purpose. Azure is noticeably lighter, cooler than Purple People Eater.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Azure is noticeably lighter, cooler than Purple People Eater.
The same difference applies the other way round: Purple People Eater is noticeably darker, 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 Purple People Eater on the colour wheel See Azure on the colour wheel
All matches: Purple People Eater equivalents · Azure equivalents