both are pretty different from rocs and buzzes. I use the fuse/core/pain combo for my mids. The core feels alot different from the buzz or roc. Faster than a buzz for sure but not sure if its adaptable as the buzz is. I use the core for straight midrange shots, thats it.
fuse is my understable mid. Nothing compares to a fuse, srry. Nothing glides like this disc. Opens up some crazy anny shots for anyone that uses it.
i hate rocs, so cant say much. Hate the rim and hate how they feel. Cant say too much to compare in that respect.