Well, the two are in entirely different classes of resorts (value vs. moderate). Some key questions are 1) are you going with kids, and 2) are you the kind of family that hangs out at your hotel, or do you just use it as a place to sleep?
Young kids will love the atmosphere of Pop. It’s like being in a giant toy box. P.O. is a bit “classier” (That’s not to say it’s not kid friendly. It’s just not a giant toy box.) If you plan to hang out and relax quite a bit, then I’d recommend P.O. If your room is just a place to sleep when you’re not at the parks, than save the money and go with Pop.
On family trips, I prefer Pop for the reasons mentioned above. If it were just me & Mrs. Cavey, then P.O. would be my choice.