ΔE 28.8, loose: different enough that you should pick on purpose. Violet Wash is a little lighter, much more saturated, cooler than Magi Purple Wash.
✓ Two Thin Coats comparison chart lists these two as equivalents.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 29). Violet Wash is a little lighter, much more saturated, cooler than Magi Purple Wash.
The same difference applies the other way round: Magi Purple Wash is a little darker, much more muted, 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 Magi Purple Wash on the colour wheel See Violet Wash on the colour wheel
All matches: Magi Purple Wash equivalents · Violet Wash equivalents