I love POR and really think that you would love it there. It has several pools including main themed one with waterslide, children's pool, nice play area and in general a nice quiet resort. If it was the adults with slightly older children, I would tell you to stay there.
Now, I am not a true CR fan. IMO, there isn't a lot of ambience about this resort. I do like the restaurants and the fact that you can just walk on over or monorail to MK. As you have two young children, it will be easier to stay there and have direct access to the monorail when you need to take them back for naps. As they are young, I would tell you to stay at CR but in the future, stay at PORS as it is a very nice resort.