Exchange Server 2013 email archive and EV 11 email archive comparison

Hi People,

I’m currently investigating what EV v11 can offer for the Exchange Server 2013 email archiving solution.

Since the Exchange Server 2013 SP1 already got the Email Archiving feature built-in with no additional cost, I wonder if anyone here can send me the document or Technote which shows the comparison between the EV v11 archiving feature and the built-in Exchange server archiving feature ?

Or any comparison document from real life implementation would also be greatly appreciated.

Thanks,