\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
FeatureStandard Server EditionEnterprise Server Edition
Mailbox Databases 1-5 databases6-100 databases
Roles Based Access & ControlYesYes
Transport ResiliencyYesYes
Remote PowerShellYesYes
Online Move MailboxYesYes
Web-based administrationYesYes
Mailbox ResiliencyYesYes
\nKeep in mind you also need client access licenses or CAL's.  They are sold in standard and enterprise edition.  The enterprise however is just an add-on to the standard license.  So for one enterprise user you must have a standard CAL and enterprise CAL.  The main difference between the two is unified messaging which enterprise gives you the rights to.