ΔE 19.2, loose: different enough that you should pick on purpose. Fenrisian Grey is more muted, cooler than Violet Coven.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Fenrisian Grey is more muted, cooler than Violet Coven.
The same difference applies the other way round: Violet Coven is more saturated, warmer.
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 Violet Coven on the colour wheel See Fenrisian Grey on the colour wheel
All matches: Violet Coven equivalents · Fenrisian Grey equivalents