ΔE 3.9, very close: most people won’t see a difference side by side. Ink Magenta is a little lighter than Rebel Red. They are different kinds of paint: Army Painter Rebel Red is an opaque base/layer paint and Vallejo Ink Magenta 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 4). Ink Magenta is a little lighter than Rebel Red. They are different kinds of paint.
The same difference applies the other way round: Rebel Red is a little darker.
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 Rebel Red on the colour wheel See Ink Magenta on the colour wheel
All matches: Rebel Red equivalents · Ink Magenta equivalents