Well, I just learned this reading a post from disney-super-mom & thought I'd pass it on. She said that DLH has a swim test for its slide but PPH does not. So you may want to consider that.
Else, I'd vote for DLH if your little one can swim due to it's pirate boat theming at the pool, & proximity to monorail, laundry facilities (as I recall PPH doesn't have their own machines but I haven't stayed there in years), remote control boats on the little pond, waterfall area, & market (as before I don't remember a little market in PPH, but that was long ago). Also if you do Goofy's normally, it's just down stairs but you could also say the same for Lilo & Stitch @ PPH.