We've have stayed at both, and are going back to CBR in Sept. Our first trip with DD at 1.5yrs old we stayed at POR, and felt it was perfect. Resort is very quiet and laid back. Food court at POR was great, many different choices, and the onsite bakery was delicious.
We tried CBR last year, DD now 2.5yrs. For us, the theme was more to our liking at CBR. DD really enjoyed the beaches, and the main pool was much more fun at CBR. We didn't like the food court at CBR as much as POR, but it wasn't bad, just not as many choices, and no bakery. Not enough of a big deal to stop us from staying there again this year.
We think CBR is more geared to children, which is why we are going back. Honestly, we were happy with both resorts. I don't think you'll be making a mistake no matter which one you choose. GL and have a great vacation.