[Freeswitch-users] Freeswitch and Openser

Hi all, I am currently evaluating either using Freeswitch or Openser for my SIP server. I am trying to look for information that can tell me the difference between the two in terms of ease-of-maintain, ease-of-implement, and scalability. If you have such kind of information, would you please share with me? Thank you very much for your input. Best Regards, Pete