Banshee Brown vs Semi Gloss Black

How close are they?

ΔE 7.7, close: similar, with a visible difference side by side. Semi Gloss Black is a little darker, more muted than Banshee Brown.

Can I use Semi Gloss Black instead of Banshee Brown?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Semi Gloss Black is a little darker, more muted than Banshee Brown.

Can I use Banshee Brown instead of Semi Gloss Black?

The same difference applies the other way round: Banshee Brown is a little lighter, 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.