ΔE 5.6, very close: most people won’t see a difference side by side. Ruby Red is a little lighter than Emberveil. They are different kinds of paint: Army Painter Emberveil is an opaque base/layer paint and Green Stuff World Ruby 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 6). Ruby Red is a little lighter than Emberveil. They are different kinds of paint.
The same difference applies the other way round: Emberveil 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 Emberveil on the colour wheel See Ruby Red on the colour wheel
All matches: Emberveil equivalents · Ruby Red equivalents