имхо дифы удобны логи базы бекапить. делаются быстро, весят мало
Так это с логами не все так просто. Как их обрезать при диффе?
Upd
Ну просто обрезать
your database is in the Full or Bulk-Logged recovery model you can also use differential backups to eliminate the number of transaction logs that will need to be restored. Since the differential will backup all extents since the last full backup, at restore time you can restore your full backup, your most recent differential backup and then any transaction log backups that were created after the most recent differential backup. This cuts down on the number of files that need to be restored.