ΔE 9.0, close: similar, with a visible difference side by side. Baal Red is a little darker than Sun Red. They are different kinds of paint: AK Interactive Sun Red is an opaque base/layer paint and Citadel Baal Red is a one-coat contrast-style 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 9). Baal Red is a little darker than Sun Red. They are different kinds of paint.
The same difference applies the other way round: Sun Red 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 Sun Red on the colour wheel See Baal Red on the colour wheel
All matches: Sun Red equivalents · Baal Red equivalents