Backup strategy

Hi
I'm new to espionage and liking it very much so far. However, a little confused by backups etc.
Prior to espionage, I was backing up with both Time Machine & SuperDuper to separate hard drives on a once daily basis. I have read the backing up to Time Machine post but still have a few questions....
Is the main issue with Time Machine backups due to the locked/unlocked state of the relevant folder? For example, are there any disadvantages to using Time Machine to continue with backing up as usual, if the relevant folder is in the same state each time?
Does SuperDuper also handle things the same way?
What are the disadvantages to using the built in backup in espionage?
Can I backup to the same physical drives that I'm backing up to with TimeMachine and SuperDuper?
Thanks
I'm new to espionage and liking it very much so far. However, a little confused by backups etc.
Prior to espionage, I was backing up with both Time Machine & SuperDuper to separate hard drives on a once daily basis. I have read the backing up to Time Machine post but still have a few questions....
Is the main issue with Time Machine backups due to the locked/unlocked state of the relevant folder? For example, are there any disadvantages to using Time Machine to continue with backing up as usual, if the relevant folder is in the same state each time?
Does SuperDuper also handle things the same way?
What are the disadvantages to using the built in backup in espionage?
Can I backup to the same physical drives that I'm backing up to with TimeMachine and SuperDuper?
Thanks