Well, our family thought the service at Ohana sucked and the food was overall quite salty. We enjoyed 1900 Park Fare much more. The food was fine to us (not stellar, not terrible) and the characters were great. Of course, this is just a snap shot of one experience on one particular night.
If the food at Ohana sounds yummy to you, I'd try it. I personally thought it was OK, I just needed a lot of water to go along with my meal. My husband was totally turned off & never wants to go back there ever again.
There is a larger selection of items at 1900 Park Fare, enough to please a diverse family. But it is pretty much like any other dinner buffet, nothing too unique or exciting about the selections.