Un livre blanc interessant à lire
http://download.microsoft.com/download/1/F/8/1F8BD4EF-31CC-4059-9A65-4A51B3B4BC98/Hyper-V-vs-VMware-ESX-and-vShpere-WP.pdf
http://blogs.technet.com/b/fabricem_blogs/archive/2010/10/04/microsoft-hyper-v-vs-vmware-esx-amp-vsphere-operations-amp-management-cost-analysis-white-paper.aspx