Has anyone tried both VMWare Fusion and Parallels on a Macbook Air? Does it do better with one over the other? Thanks!
I have both installed on my Air - Fusion holds a copy of my work laptop, and Parallels has my 'personal' XP installation. I don't think it's necessarily specific to the Air, but I find that Parallels runs much 'thinner' than Fusion and performs better. The installation of Parallels is also 24mb (main App only) vs. the Fusion install at 117mb - and that's *after* using Trimmit to remove the PPC code.
There are some known bugs in Parallels on the Air at the moment where under very specific circumstances it causes kernel panics. The developers are actively working on fixes for these, and there is a workaround that works fine for me until the fix is released.
I leave my Parallels VM running all the time, and when idle it consumes on average 7-8% CPU. Fusion averages slightly higher than this at 10-12% (though for some I suppose that's negligible). I also consistently have network issues with Fusion where the virtual adapter doesn't seem to start, requiring OS X to be restarted to get network connectivity restored.
Edit: The thread about the kernel panics in Parallels is here:
http://forum.parallels.com/showthread.php?t=19507. Apparently the issue is fixed and the new build is in QA.