ΔE 10.0, close: similar, with a visible difference side by side. Quinacridone Magenta is more saturated, cooler than Slaughter Red. They are different kinds of paint: Army Painter Slaughter Red is a one-coat contrast-style paint and Golden Quinacridone Magenta is an opaque base/layer 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 10). Quinacridone Magenta is more saturated, cooler than Slaughter Red. They are different kinds of paint.
The same difference applies the other way round: Slaughter Red is more muted, warmer.
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 Slaughter Red on the colour wheel See Quinacridone Magenta on the colour wheel
All matches: Slaughter Red equivalents · Quinacridone Magenta equivalents