Classic Roc and Roc are completely different. First time I thrown a regular Roc I didn't like it because of the domish tops (Pro Rocs and Ontarios). Actually havn't tried the Rancho's. I have a few white and red ones.
Rocs to me turnover much easier and get more various results with difference amount of power (true with any midrange, though much more so with a Roc). I would say a Roc is more touchy then a Buzzz.You have to treat her right or else she isn't putting out. She's a classy lady, lol.
i've thrown my buddies DX Roc and i thought it was ok but didn't like the feel of it in my hand, i just got a 171g elite z buzzz a few days ago and i haven't thrown it yet but it does feel really good in my hand so i hope it flies as nice as it feels.
Not a question of which is better - it's a question of which you prefer, which fits your particular throwing style. I happen to prefer the Buzzz, but that's just me - it works for me. Others like the Roc - when in doubt, try both and see which you like.
They're both great discs! Buzz holds a line better for me, where the Roc flips a little more. But I guess it all depends on weight, wear stage, and the thrower. I throw the Buzz but I also carry a Roc, just in case I decide to launch mass midrange at a basket!