ΔE 13.8, fair: the same colour family, but not a straight swap. Purple Shadow is a little darker, warmer than Malicious Violet.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Purple Shadow is a little darker, warmer than Malicious Violet.
The same difference applies the other way round: Malicious Violet is a little 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 Malicious Violet on the colour wheel See Purple Shadow on the colour wheel
All matches: Malicious Violet equivalents · Purple Shadow equivalents