ΔE 7.6, close: similar, with a visible difference side by side. Primary Magenta is a little lighter, more saturated than Evil Sunz Scarlet. They are different kinds of paint: Citadel Evil Sunz Scarlet is an opaque base/layer paint and Golden Primary Magenta 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 8). Primary Magenta is a little lighter, more saturated than Evil Sunz Scarlet. They are different kinds of paint.
The same difference applies the other way round: Evil Sunz Scarlet is a little darker, 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 Evil Sunz Scarlet on the colour wheel See Primary Magenta on the colour wheel
All matches: Evil Sunz Scarlet equivalents · Primary Magenta equivalents