ΔE 5.9, very close: most people won’t see a difference side by side. Red Ink is more saturated than Doombull Brown. They are different kinds of paint: Citadel Doombull Brown is an opaque base/layer paint and Reaper Red Ink 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). Red Ink is more saturated than Doombull Brown. They are different kinds of paint.
The same difference applies the other way round: Doombull Brown is more muted.
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 Doombull Brown on the colour wheel See Red Ink on the colour wheel
All matches: Doombull Brown equivalents · Red Ink equivalents