ΔE 9.1, close: similar, with a visible difference side by side. Banshee Brown is a little lighter, more muted than Black Brown.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Banshee Brown is a little lighter, more muted than Black Brown.
The same difference applies the other way round: Black Brown is a little darker, more saturated.
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 Banshee Brown on the colour wheel
All matches: Black Brown equivalents · Banshee Brown equivalents