ΔE 11.8, fair: the same colour family, but not a straight swap. Purple Glaze is a little darker, more saturated than Corax White. They are different kinds of paint: Citadel Corax White is an opaque base/layer paint and Two Thin Coats Purple Glaze is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Purple Glaze is a little darker, more saturated than Corax White. They are different kinds of paint.
The same difference applies the other way round: Corax White is a little lighter, more muted.
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 Corax White on the colour wheel See Purple Glaze on the colour wheel
All matches: Corax White equivalents · Purple Glaze equivalents