ΔE 4.8, very close: most people won’t see a difference side by side. Viper Brown is a little darker than Matt Dry Blood. They are different kinds of paint: AMMO by Mig Matt Dry Blood is an ink, glaze or transparent paint and Army Painter Viper Brown is an opaque base/layer 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). Viper Brown is a little darker than Matt Dry Blood. They are different kinds of paint.
The same difference applies the other way round: Matt Dry Blood is a little lighter.
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 Matt Dry Blood on the colour wheel See Viper Brown on the colour wheel
All matches: Matt Dry Blood equivalents · Viper Brown equivalents