ΔE 5.9, very close: most people won’t see a difference side by side. Plasma Red is cooler than Primer Red Oxide. They are different kinds of paint: Pro Acryl Primer Red Oxide is a technical paint or medium and Vallejo Plasma Red is a one-coat contrast-style 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 6). Plasma Red is cooler than Primer Red Oxide. They are different kinds of paint.
The same difference applies the other way round: Primer Red Oxide is warmer.
ΔE is the colour difference between our two swatch estimates: under 2 is a perfect match (you’d struggle to tell them apart), under 6 very close, under 10 close, under 15 fair, under 20 loose, under 30 very loose, and 30 or more a poor match. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Primer Red Oxide on the colour wheel See Plasma Red on the colour wheel
All matches: Primer Red Oxide equivalents · Plasma Red equivalents