ΔE 21.0, loose: different enough that you should pick on purpose. Witch Purple is a little lighter, much more saturated, warmer than Spellbound Fuchsia.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 21). Witch Purple is a little lighter, much more saturated, warmer than Spellbound Fuchsia.
The same difference applies the other way round: Spellbound Fuchsia is a little 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 Spellbound Fuchsia on the colour wheel See Witch Purple on the colour wheel
All matches: Spellbound Fuchsia equivalents · Witch Purple equivalents