c9429b30_yper_V_VS_Citrix_Xen___My_Blog__Hypervisor_Attributes
[VMware ESXi 5.0] No reliance on general purpose operating system (VMware vSphere Hypervisor) Relies on Windows 2008 in Parent Partition [Citrix XenServer 5.6 FP1] Relies on Linux in Dom0 management Partition [Hypervisor Attributes] 
OS Independence
Comparison between Vmware VS Hyper-V VS Citrix Xen | My Blog
Hypervisor Attributes