I've used both. Honestly, I don't have any hard stats to back this up but in a Unix environment, VirtualBox is the way to go. I've done a bit of dev on a Window

I've used both. Honestly, I don't have any hard stats to back this up but in a Unix environment, VirtualBox is the way to go. I've done a bit of dev on a Windows machine, for training purposes, and I've found that VMware has better performance. Again, this is based solely on subjective, empirical data. And yes, Vagrant is awesome.