ΔE 13.8, fair: the same colour family, but not a straight swap. Deep Scarlet Ink is noticeably darker, cooler than Barak-Nar Burgundy. They are different kinds of paint: Citadel Barak-Nar Burgundy is an opaque base/layer paint and Nocturna Models Deep Scarlet Ink is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Deep Scarlet Ink is noticeably darker, cooler than Barak-Nar Burgundy. They are different kinds of paint.
The same difference applies the other way round: Barak-Nar Burgundy is noticeably lighter, 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 Barak-Nar Burgundy on the colour wheel See Deep Scarlet Ink on the colour wheel
All matches: Barak-Nar Burgundy equivalents · Deep Scarlet Ink equivalents