I added a poll to help you out. But I feel that Port Orleans is a far superior resort in quality and theme. I've stayed at Caribbean Beach Resort several times as well, but I don't like the layout or the older rooms.
I know the original question was about Port Orleans French Quarter. But I will say that I like Riverside better than FQ. The buildings are much more spread out, the atmosphere is different. And Old Man Island is just a cool place to hang out.