Kicking things off with OpenArena 0.8.8 and running at resolutions of 800 x 600, 1024 x 768, and 1440 x 900, VMware Fusion was clearly the winner each time. While this is from the Retina MacBook Pro, resolutions up to 1440 x 900 were tested since VirtualBox had problems beyond this resolution. At each resolution, VMware Fusion with its 3D support was about three times faster when using the same host hardware/software.
World of Padman was also significantly faster with VMware Fusion over VirtualBox. For those curious about the OpenGL performance results for the Retina MacBook Pro test hardware when running bare metal, those will come in a later article. (Until then you can see the earlier results.)