ΔE 9.3, close: similar, with a visible difference side by side. Blue Violet is a little darker than Cultist Purple.
✓ Two Thin Coats comparison chart lists these two as equivalents.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Blue Violet is a little darker than Cultist Purple.
The same difference applies the other way round: Cultist Purple is a little lighter.
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 Cultist Purple on the colour wheel See Blue Violet on the colour wheel
All matches: Cultist Purple equivalents · Blue Violet equivalents