ΔE 30.3, loose: different enough that you should pick on purpose. Ink Magenta is noticeably lighter, much more saturated, warmer than Clear Plum.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 30). Ink Magenta is noticeably lighter, much more saturated, warmer than Clear Plum.
The same difference applies the other way round: Clear Plum is noticeably darker, much more muted, 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 Clear Plum on the colour wheel See Ink Magenta on the colour wheel
All matches: Clear Plum equivalents · Ink Magenta equivalents