ΔE 6.6, close: similar, with a visible difference side by side. Red is more saturated than Blood Angels Red. They are different kinds of paint: Citadel Blood Angels Red is a one-coat contrast-style paint and Green Stuff World Red 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 7). Red is more saturated than Blood Angels Red. They are different kinds of paint.
The same difference applies the other way round: Blood Angels Red is 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 Blood Angels Red on the colour wheel See Red on the colour wheel
All matches: Blood Angels Red equivalents · Red equivalents