ΔE 16.1, loose: different enough that you should pick on purpose. Barak-Nar Burgundy is a little lighter, much more saturated, cooler than Black Brown.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Barak-Nar Burgundy is a little lighter, much more saturated, cooler than Black Brown.
The same difference applies the other way round: Black Brown is a little darker, much more muted, 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 Black Brown on the colour wheel See Barak-Nar Burgundy on the colour wheel
All matches: Black Brown equivalents · Barak-Nar Burgundy equivalents