They are both great resorts with beautiful grounds and great theming. I would choose POR, mainly because of the resort layout. The CBR is HUGE--it is the only resort with its own inter-resort bus service. If you get stuck in one of the remote buildings, it can take forever just to get a coke or a snack at the food court.
Other than that, I think they are pretty much the same. I would give a slight edge to the CBR food court, and also a slight edge to CBR bus service, but POR has the boat service to Downtown Disney, which is great.