ΔE 12.4, fair: the same colour family, but not a straight swap. Blue Glaze is a little lighter, more saturated, warmer than Wolf Grey. They are different kinds of paint: Army Painter Wolf Grey is an opaque base/layer paint and Two Thin Coats Blue 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). Blue Glaze is a little lighter, more saturated, warmer than Wolf Grey. They are different kinds of paint.
The same difference applies the other way round: Wolf Grey is a little darker, more muted, 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 Wolf Grey on the colour wheel See Blue Glaze on the colour wheel
All matches: Wolf Grey equivalents · Blue Glaze equivalents