I like the roc better. The main reason is that it is a midrange disc and the roc is more of a mid range than the buzz. I want my mids to float and land soft with very little or no skip. The other thing I love about the roc is I can buy it in DX plastic and it wears very slow. I hear people talking about the buzz coming in better plastic all the time, but I like my rocs in the cheaper plastic so I can control the wear on them to mold a perfect mid disc. I have one chapion roc that is my stable mid. I have 4 DX rocs that range from very understable to stable. Even though they are DX rocs, they wear very slow. My KC roc has been in my bag for 3 years and still flies strait with a little fade at the end.
Don't get mids confused with drivers people. Mids are ment to be very flexible. It is important to throw mids that can beat up and flip for you. Not for off the t-pad, but for those inbetween shots. If you need to throw a soft shot that has to turn over, good luck with a high grade plastic buzz.
This.
I just cycle Dx Rocs though