Re: [BBR] Boolberry: Privacy and Security - Guaranteed[Bittrex/Poloniex]GPU Released
BBR's POW and Diff are different from XMR and the exploit seems to be exploiting XMR only anyway. There is no slippage to BBR yet which is fascinating to me as well as the fact that some of the XMR dumpers also slowly dumped BBR to keep the silver coin in check 
BCX's attack has nothing to do with POW per se. It targets Cryptnote's implementation of ring signatures AFAIK.
BBR is a much easier target for a Sybil mediated timewarp attack because it has a far smaller network than XMR securing it.