ΔE 8.0, close: similar, with a visible difference side by side. Sanguinem Red is more muted than Bright Red. They are different kinds of paint: Army Painter Bright Red is a one-coat contrast-style paint and Green Stuff World Sanguinem 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 8). Sanguinem Red is more muted than Bright Red. They are different kinds of paint.
The same difference applies the other way round: Bright Red is more saturated.
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 Bright Red on the colour wheel See Sanguinem Red on the colour wheel
All matches: Bright Red equivalents · Sanguinem Red equivalents