Add a Hyper-V Virtual Machine in Windows Server 2012
It is the same procedure with other Windows platform if adding a hyper-v virtual machine on Windows Server 2012. Here is just record our earlier work:
Enable Hyper-V on Windows Server 2012
Hyper-V is a build-in feature on Windows Server new editions such as Windows Server 2012, so you do not need to install Hyper-V but just enable it.
Reduce Virtual Machine Disk Size on VMware Workstation 10
After you used some while on VMware virtual machine, you might found your disk file (.vmdk) becomes huge.
VMware vSphere vs Microsoft Hyper-V They said
No, we do not have any idea about VMware vSphere vs Microsoft Hyper-V currently.