The following link provides a document comparing all Virtualization Features of

Windows Server 2008 R2  with Windows Server 2012 Release Candidate

http://download.microsoft.com/download/2/C/A/2CA38362-37ED-4112-86A8-FDF14D5D4C9B/WS%202012%20Feature%20Comparison_Hyper-V.pdf

 

And there is another great document which compares VMware 5.0 with Hyper-V Windows Server 2012 Release Candidate

http://download.microsoft.com/download/5/A/0/5A0AAE2E-EB20-4E20-829D-131A768717D2/Competitive%20Advantages%20of%20Windows%20Server%202012%20RC%20Hyper-V%20over%20VMware%20vSphere%205%200%20V1%200.pdf