Is parallels 7 better in performance then Vmware Fusion 4?
Ars Technica recently did a rundown of the performance differences between Parallels 7 and VMware Fusion 4: http://arstechnica.com/apple/reviews/2011/10/virtual-showdown-parallels-desktop-7-and-vmware-fusion-4-reviewed.ars

The general takeaway seemed to me to be that Parallels is delivering better performance outside some very particular uses.