For some reason, I need to boot Windows XP occasionally on my MacBook Air. Among VirtualBox, VMWare Fusion and Parallels, which one consumes the least resource from my MacBook (say, running IE and PowerPoint inside the Windows XP VM)? Thanks!
I've only used Fusion on my Macs, and they ran very smoothly - Unity mode was a godsend on myriad occasions!
Now I'm running VirtualBox and VM Workstation on my work machine, and find they're both good - but for different things. VirtualBox is snappier, uses less memory overhead, and supports the range of OSes I most want/need to use for desktop environments.
VMware Workstation is not as snappy, uses more memory, etc - but also does a better job of juggling multiple simultaneous VMs, and seems to handle the server OSes overall better than VirtualBox.