ΔE 19.0, loose: different enough that you should pick on purpose. Magenta is noticeably lighter, more saturated than Purple.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Magenta is noticeably lighter, more saturated than Purple.
The same difference applies the other way round: Purple is noticeably darker, more muted.
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 on the colour wheel See Magenta on the colour wheel
All matches: Purple equivalents · Magenta equivalents