ΔE 4.8, very close: most people won’t see a difference side by side. Orange is more saturated than Blood Red. They are different kinds of paint: Army Painter Blood Red is a one-coat contrast-style paint and Green Stuff World Orange is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.
Yes, for most jobs. Very close match (ΔE 5). Orange is more saturated than Blood Red. They are different kinds of paint.
The same difference applies the other way round: Blood 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 Red on the colour wheel See Orange on the colour wheel
All matches: Blood Red equivalents · Orange equivalents