ΔE 5.4, very close: most people won’t see a difference side by side. Ink Red is more saturated than Slaughter Red. They are different kinds of paint: Army Painter Slaughter Red is a one-coat contrast-style paint and Vallejo Ink Red 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). Ink Red is more saturated than Slaughter Red. They are different kinds of paint.
The same difference applies the other way round: Slaughter 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 Slaughter Red on the colour wheel See Ink Red on the colour wheel
All matches: Slaughter Red equivalents · Ink Red equivalents