ΔE 9.8, close: similar, with a visible difference side by side. Transparent Purple is warmer than Kantor Blue. They are different kinds of paint: Citadel Kantor Blue is an opaque base/layer paint and Green Stuff World Transparent Purple is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.
Usually, if you are not matching paint already on the model. Close match (ΔE 10). Transparent Purple is warmer than Kantor Blue. They are different kinds of paint.
The same difference applies the other way round: Kantor Blue 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 Kantor Blue on the colour wheel See Transparent Purple on the colour wheel
All matches: Kantor Blue equivalents · Transparent Purple equivalents