cNet has taken every major option for running Windows on your Mac into the lab and benchmarked the results. What did they find out?
For speed in virtualization, Fusion is the clear winner.
I haven’t run extensive official benchmarks, but even I can tell you that Fusion is much snappier than Parallels when it comes to performance. I’ve been trying out both solutions for the past week, and while neither of them does a terribly good job with Vista at this point, Fusion is – hands down – my favorite of the two, and the reason for that is the speed.
Parallels has some real lag problems from what I’ve seen. It’s a very flashy, Mac-like, application, and all that is well and good, but Fusion – which is a much less flashy program – gets the job done faster, and that makes all the difference to me.