ΔE 39.8, loose: different enough that you should pick on purpose. Cardinal Purple is noticeably darker, warmer than Volupus Pink.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 40). Cardinal Purple is noticeably darker, warmer than Volupus Pink.
The same difference applies the other way round: Volupus Pink is noticeably lighter, 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 Volupus Pink on the colour wheel See Cardinal Purple on the colour wheel
All matches: Volupus Pink equivalents · Cardinal Purple equivalents