Joan, I thnk "rope" and "twist" could be synonymous. But if you are smoking a brown rope/twist it is almost nothing like a black rope/twist....other than how the tobac is presented.
The black is "usually/maybe/kinda/sorta" not quite as strong and peppery and has a, well, black taste to it. maybe sort of oily tasting. Certainly worth trying, but i can also understand where some wouldn't like it at all. The black is very much an occasional smoke for me,as a little bit goes a looong way. I prefer the brown's in general