• Windows PowerShell scripts can be developed and scheduled ( Windows Task Scheduler), whereas Central Administration is used for single-use backups and restores.
• Windows PowerShell has the advantage of running against SQL snapshots instead of the production database. One of the parameters of the Windows PowerShell command will cause a SQL snapshot to be generated, and then Windows PowerShell will run the action against the snapshot instead of the production database. This will reduce the resource impact of the backup operation on the production environment.
• With Windows PowerShell, SharePoint administrators will have more granular control of options for the backup or restore.