In the 3.5 handbook, for sunder it says that you are unable to sunder armor worn by another character. Now that's something that has changed in PF since they've made sunder much more friendly and viable (yay!)
Also in the 3.5 DMG it's stated that magic weapons & shields with an enhancement bonus can only be sundered by a weapon of at least the same enhancement. Ok so +1 sword cant sunder +3 sword but another +3 sword can right?
In PF they also have the statement that magic weapons can't be sundered except by other magic weapons of at least the same enhancement. The problem is they don't mention shields in this spot in the PF book. Worse yet since worn armor went from being unsunderable in 3.5 to fair game in PF, the book has failed to say one way or the other if you have to have a weapon of equal or greater enhancement to sunder magic armor.
So I'm calling for an official rule & errata on this.
In order to sunder a magically enhanced weapon/shield/armor worn/wielded by a foe, do you have to make the attempt with a magic weapon of at least the same enhancement?
The intent seems to be yes so that's how I'll play it for those three cases until it gets errata'd