Califcornication was remastered (thank god), but BSSM hasn't been and never needs a remaster.
The only version that's different so far IIRC is the Japanese 2006 (?) CD which was WAY compressed and garbage.
The new BSSM vinyl is the original master repressed, and it sounds amazing.
The Chili Pepper triumphs masters wise are probably BSSM (Rick Rubin) and the LP cut of Stadium Arcadium (Steve Hoffman). Mother's Milk ain't half bad either.
Oh got ya, i just saw everyone talking about how amazing the Reissue for BSSM sounded and assumed that it had been remastered, guess it was just an awesome new pressing for it. Either way, Im happy i bought it :D i cant wait to listen to Stadium Arcadium though, people say its the best sounding, most audiophile, of all the Red Hot Chili Peppers records. Not to mention it being one of my favorite CDs of all time.