We stayed at POFQ recently, and the trip around to all the bus stops at POR seemed to take longer than what we experienced at CBR. (it may have been because we weren't used to sharing at POFQ, so it came as a surprise).
In general, the distances to the Magic Kingdom are about equal (5 miles from POR and 6 from CBR) but CBR is closer to DHS and AK. They're the same distance from Epcot.
I would never make a decision based on transportation alone, because all the buses are run by the same system. There can be flukes everywhere.
As for appeal....the double beds at CBR turn me off to it. When we stayed it was with a king size bed, so we got around it.