ΔE 6.2, close: similar, with a visible difference side by side. Sacra Purple is a little darker than Coven Purple. They are different kinds of paint: Army Painter Coven Purple is an opaque base/layer paint and Green Stuff World Sacra 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 6). Sacra Purple is a little darker than Coven Purple. They are different kinds of paint.
The same difference applies the other way round: Coven Purple is a little lighter.
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 Coven Purple on the colour wheel See Sacra Purple on the colour wheel
All matches: Coven Purple equivalents · Sacra Purple equivalents