Commvault vs Syncsort NSB

Hi,

I am comparing the possibility of acquiring Commvault or Syncsort NSB. Currently I have a netapp SAN environment, and also a MS HyperV cluster environment. Syncsort is attempting to sell using their Block Level backup technology, which oddly Commvault also has. Downpoint I am facing for Commvault now is the requirement of media server, master server etcs. Downpoint I am facing for Syncsort now is the ONLY NETAPP endpoint. Please share your views.