If you are literally mirroring the contents of one disk to another and nothing is wrong with the current install, then i'd just copy it.
reinstalling wont make a noticeable difference unless your windows install is already full of clutter.
If you are literally mirroring the contents of one disk to another and nothing is wrong with the current install, then i'd just copy it.
reinstalling wont make a noticeable difference unless your windows install is already full of clutter.