ΔE 23.9, loose: different enough that you should pick on purpose. Sunset Purple is noticeably darker, much more muted, warmer than Warlock Magenta.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 24). Sunset Purple is noticeably darker, much more muted, warmer than Warlock Magenta.
The same difference applies the other way round: Warlock Magenta is noticeably lighter, much more saturated, 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 Warlock Magenta on the colour wheel See Sunset Purple on the colour wheel
All matches: Warlock Magenta equivalents · Sunset Purple equivalents