It may well do it, but Capita recommend using dbattach as it runs some other stuff as part of the backup process I think. I forget the details but it's something to do with how they store the SIMS user accounts in the master database. They may not support you for free if your backup fails to restore properly and you've not followed their published guidance so I wouldn't like to chance it.
For my nightly backup: I delete the old backup, run the command below, 7zip the resulting file and then back that up along with all the other gubbins under s:\sims and the docstorage.
Code:
DBAttach /Server=YOURSIMSSERVER\sims2005 /Database=SIMS /USER=SA /PASSWORD=YOURSAPASSWORD /AUTO /BACKUP /PATH="F:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Backup\RemoteBackup\SIMS-DB-nightly.bak"
As a side note, if you use FMS you should now be backing it up at the same times as you back up SIMS. It uses a different dbattach.exe.