ΔE 25.3, loose: different enough that you should pick on purpose. Quinacridone Magenta is noticeably darker, more saturated than Pixie Pink.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 25). Quinacridone Magenta is noticeably darker, more saturated than Pixie Pink.
The same difference applies the other way round: Pixie Pink is noticeably lighter, 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 Pixie Pink on the colour wheel See Quinacridone Magenta on the colour wheel
All matches: Pixie Pink equivalents · Quinacridone Magenta equivalents