These are the only two moderate resorts that I've ever stayed at, and I really, really loved them both.
CBR is so beautiful and bright and tropical, while POR is beautiful and relaxing and reminds me of my favorite parts of the Magic Kingdom (Adventureland, Frontierland, Liberty Square).
I honestly don't know which one I'd choose if I were going to choose a moderate resort. I'd probably let my DH decide! LOL
The only big difference to me is the fact that at CBR you can book (and pay extra for) a "preferred" location which would put you close to the main building (restaurant, shops, arcade) and the main pool, while at POR there are no "preferred" buildings so all you can do is make a request to be close to the main building area. When I stayed at POR in early May I was fortunate enough to get a room in Building #18 in the Alligator Bayou section, which was very convenient to everything.
The rooms at CBR are larger; 340 sq ft VS 314 sq ft.
P.S. I have pictures of both of these resorts on my web page. The link is below in my signature.