As far as facilities go there is no real difference between the two hotels, either would be a great choice. The only real difference is in the ambiance of the hotels. CBR is laid out as a group of "villages" grouped around a central lake or "lagoon" it feels nearer to a condo style village development than a usual hotel does , PO perhaps has a more regular "hotel/resort" feel to it and is certainly more compact, but that doesn't mean it feels cramped. I wouldn't say either is better because of their particular slant, just they give the guest a slightly different experience.
For travelling to WDW themeparks there is nothing to choose between the two. PO offers water taxis to DTD which is probably a slight plus to it's offering.
I'm sure you will love the hotel and the kids will feel very pleased to have had an input into your choice.