I've stayed at both, and I would only stay at CB again if in a preferred room with a great discount over POR or if we were driving. I just stayed there and mid September, and they were not doing split busing. And for me, it all comes down to the busing. Our room was in Aruba, so we were the second bus stop out of seven. You need to easily plan on additional 20 minutes to your time just for the bus stops within the resort, sometimes more. And that is outside of the 90 minutes Disney recommends. I had a very hard time with spending more time within the resort than what it took to actually get to the parks.
Also, the water can be very long depending on where your room is located. I don't mind the walk so much up to the food court, but with having the refillable mug, we definitely did not get our use out of it there like we do at other resorts. Our routine is to always run up and fill our mugs in the morning before heading to the parks, and with being in building 56 Aruba, what felt like the absolute furthest possible location away from the food court, it was just not possible for us to run up there and refill as often as we would like.
I really liked the food court at CB, and would actually give the edge to CB on this one.
As for POR - I love everything about it. I love the atmosphere, I love the walks to the main building, love the boat to DS. Love it.