We ate at both locations in September, and it was our first time at each....(but keep in mind, we have no kids, so this is just two adults view)
WCC is LOUD, I mean really LOUD
....not "my god get me out of here loud" but kids could talk in their "outside voice" (is that still used?) the whole time and you wouldn't bat an eye...there is always something going on, if not at your table, then at someone elses! There is a constant clatter. DH and I were commenting that kids have got to love this place because you can hoot, hollar, swing your napkin around, laugh at your dad as he is singing in front of everyone and then "ride" a horse around the whole place, and mom and dad can't get mad!
At Ohana, I didn't even notice any activities....I remember a "cousin" talking on a microphone and kids gathering around for the coconut races, but it didn't even draw my attention long enough to figure out what the heck the coconut races were! (Perhaps the break in my feeding is when the man was talking on the microphone....it must have been a quick break if I don't remember anything else!)
The food at both places was great....all served family style, more of whatever you want brought out at your request....I gotta say that WCC edges Ohana out just a bit over all, but I don't think you can go wrong at either one!