ΔE 3.3, very close: most people won’t see a difference side by side. Mahogany Ink is cooler than Ashroot. They are different kinds of paint: Army Painter Ashroot is an opaque base/layer paint and Vallejo Mahogany 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 3). Mahogany Ink is cooler than Ashroot. They are different kinds of paint.
The same difference applies the other way round: Ashroot is warmer.
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 Ashroot on the colour wheel See Mahogany Ink on the colour wheel
All matches: Ashroot equivalents · Mahogany Ink equivalents