Re: [BBR] Boolberry: Privacy and Security - Guaranteed[Bittrex/Poloniex]GPU Released
and Monero has developed RingCT which will allow for non-zero mixin ring signatures, something that no other cryptonote has.
I think you meant non-zero mixin multi-sig, right?
I am not interested to start a fight so I will not list here the big list of Monero advantages over BBR. Those who want to can hop over Monero thread on bct or reddit.
BTW, I hope BBR gets moving soon and become a strong member of the CN family.