Having been to pretty much every level of Vegas buffet, I think I can say with certainty that food is probably the last on the breakfast buffet criteria check list in The World -at least for me, As noted, they're fairly standard and uniform in that regard. And they're both going to be packed, unless you have a timing deal like Magoo did.
As suggested, choose based on how the venue fits into the total experience you're looking for that day. If it's important for the kids to dine, shake a Pooh Bear's hand, and then dash right into the park to ride something, then CP.
On the other hand, kind of fun to relax and take the boat to the GF maybe - stroll around the grounds a little - look the place over inside. Not sure if you've been there before, but always nice to see new places, etc, and it is pretty "grand".
As is the case with most things you do on property, it's all about the total experience.
Either choice, you can't lose really.