ΔE 28.0, loose: different enough that you should pick on purpose. Violet Red is a little darker, much more muted, warmer than Xereus Purple.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 28). Violet Red is a little darker, much more muted, warmer than Xereus Purple.
The same difference applies the other way round: Xereus Purple is a little lighter, much more saturated, 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 Xereus Purple on the colour wheel See Violet Red on the colour wheel
All matches: Xereus Purple equivalents · Violet Red equivalents