I throw both the Roc and the Buzzz. For me, I can get my San Marino Star Roc the same distance as my ESP Buzzz. The Roc will go straigth as an arrow and die right (LHBH). The buzzz (beat up) will turn and then come back to its original start point (if thrown with a gentle hyzer releas). The buzzz will hold an anhyzer line better than my Roc at this point, but I bet a DX Roc would beg to differ. My Roc will hold an hyzer line better at full power, but my Buzzz will glide much longer on a nice gentle hyzer (say 80% power, otherwise, it flips flat). A new ESP Buzzz won't turn as much though.
All that being said, people are right, the Roc does need a little more height to go as far, but not that much more.
I can throw both at around 280 I'd say (at normal full power aka game situation).