Just my opinion, but all of the pools are about the same in that regard, with the exception of the Roman pool discussed below. All probably will have some kids, I wouldn't say any is more suited for adults or children, they all kind of have things for both really, and all are a little different and have different themes.
Now the Portifino does have the Roman pool or whatever its called, that is kind of a nice large square/rectangle type traditional pool that has cabanas, I do believe that they try to make that the "adult" pool, but I am not totally sure about that. P has I think 3 pools in all. One is pretty small, one is the roman, one is the really cool large pool with sand beach zero entry with the castle/waterslide and it has a waterfall coming off the castle. That is actually my favorite out of all the pools on site.