Thee answer to you last question is yes. BESR is a sector level imaging tool, that can also do rudimentary file/folder backups too. BESR is best suited as a disaster recovery tool for recoving an entire systems after they crash or die. It is also possible to recover just files and folders from the images. IMHO, the file and folder backup capabilities of BackupExec are better than those of BESR
BackupExec Desktop is a file and folder level backup tool. If your budget allows, you can actually run the two products on the same computer. You would use BESR to capture a distater recovery image periodically, and use BackupExec to backup important files and folders. If you needed to recover the system from scratch, you would use BESR to bring the system back to life, and BackupExec to restore the files and folders t o the point of the most current backup