Do Recovery Manager backups contain any more information than a native Windows System State backup?
Recovery Manager can backup Group Membership from all domains in the Forest, which enables restore of cross-domain group memberships.
Recovery Manager does allow granular selection of the system state elements you want to back up. For example, you could decide to back up your DIT (AD Database) and SYSVOL without backing up the registry, boot files, IIS metabase, etc.
Recovery Manager also has the ability to back up ADAM (Active Directory Application Mode) / AD-LDS (Light-weight Directory Services) instances as well.