I came across a nice flash video doing a side by side comparison of the Microsoft Hyper-V install and the VMware ESXi install.  The Hyper-V install was using the Windows 2008 Core version and the ESXi was a baremetal install.  The results are not that shocking.  You can view the video by clicking here.

	Microsoft Hyper-V	VMware ESXi
Reboots:	7	1
Keystrokes:	684	85
Clicks:	30	14
Elapsed Time:	37:37	10:01

Happy New Year!