Not many article mentioned the real difference on the two backups even though most of the time the guide always mentioned to perform mds_backup script instead of backup.
After consulting with TAC, the conclusion is this:
Backup will perform back up Os config and database for the entire MDS while mds_backup will only perform mds backup but not the OS.
However one thing that i notice, mds_backup also perform backup of the interfaces and its IP address.
The OS in this case is most of the thing that u can see on the Web portal are related to OS configuration
Cheers,
ASK
engineereverydaylife 