As said yugrinov we can vmotion the vm between two esxi servers with non-shared storage if u are running on ESXi 5.1.. which means ( SvMotion + vMotion) at the same time.
for EVC - go through this link http://pubs.vmware.com/vsphere-51/topic/com.vmware.vsphere.vcenterhost.doc/GUID-03E7E5F9-06D9-463F-A64F-D4EC20DAF22E.html