I want to know that what is difference between VMware converter to making backup of VMs and VMware Data Recovery 2.0
I think VMconvert will be easy even I didn't used both but plannig to select good one for VM backups
Even though you could (mis-)use VMware Converter to "backup" a VM, it's not a backup application. It's build to convert e.g. physical systems to virtual machines.
With VMware Data Recovery you can setup schedules to backup the VM's automatically (full, differential, ...) and restore either the complete VM or - depending on the guest's file system - restore single files.