>>40
VirtualBox has better performance. It's a lot sleeker and the responses are better. If you have worked with both you'll know the difference.
Also it doesn't have those dreaded timing problems on speedstepping CPUs at all, while VMWare just can't get rid of them. It's a really ugly mess, there is a 10+ page PDF document explaining the issue and offering a number of "workarounds". Some of those work to some extent on some hardware while making it worse on different hardware and so on. Bottom line: You have to try around until you get the least possible jitter and hope for your NTP client to be able to keep up.
As for features, you probably won't find much lacking in VirtualBox compared to VMWare. As a bonus VirtualBox has that "seamless" mode for Windows guests, if you're into that.
Oh, and
>>41 of course.
>>42
that you can give it access to Windows files and folders too
Any serious virtualization solution lets you do that, no?