ΔE 9.7, close: similar, with a visible difference side by side. Glazier Blue is warmer than Blue Horror.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Glazier Blue is warmer than Blue Horror.
The same difference applies the other way round: Blue Horror is 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 Blue Horror on the colour wheel See Glazier Blue on the colour wheel
All matches: Blue Horror equivalents · Glazier Blue equivalents