ΔE 0.5, perfect: as near the same colour as our swatches can tell. Our swatches for the two are almost the same. They are different kinds of paint: Pro Acryl Primer White is a technical paint or medium and Vallejo Aluminium (Metal.) is a metallic, so they won’t behave the same on the model even where the colour is close.
Yes, for most jobs. Perfect match (ΔE 1). The swatches are almost the same. They are different kinds of paint.
The same difference applies the other way round.
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 White on the colour wheel See Aluminium (Metal.) on the colour wheel
All matches: Primer White equivalents · Aluminium (Metal.) equivalents