ΔE 6.4, close: similar, with a visible difference side by side. Red is a little darker than Angron Red Clear. They are different kinds of paint: Citadel Angron Red Clear is an opaque base/layer 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 6). Red is a little darker than Angron Red Clear. They are different kinds of paint.
The same difference applies the other way round: Angron Red Clear 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 Angron Red Clear on the colour wheel See Red on the colour wheel
All matches: Angron Red Clear equivalents · Red equivalents