Not really. Theres a really bad sci-fi in a slightly similiar vein called Deadlock (I think) It had the same collars in it any way.

I haven't really seen anything else like BR, including BR2, which, IMHO, sucked.

Ichi the Killer has at least the same level of violence, but definitly more sadism, but no Sci-Fi. Versus is a great zombie movie. I don't know if you are aware of it (and I havent checked it out myself) but Tokyo Pop has put out a manga series for BR.

I'd love to know of other movies similiar to BR.