ΔE 14.7, fair: the same colour family, but not a straight swap. Witch Purple is a little darker, much more muted than Power Node Glow.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 15). Witch Purple is a little darker, much more muted than Power Node Glow.
The same difference applies the other way round: Power Node Glow is a little lighter, much more saturated.
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 Power Node Glow on the colour wheel See Witch Purple on the colour wheel
All matches: Power Node Glow equivalents · Witch Purple equivalents