I was curious too and have no idea where the food is better. But La Hacienda has large windows and is suppose to be a good spot for view Illuminations. We made an 8:00 dinner ADR so we could sit and watch Illuminations after we were finished eating. Plan on showing up early and hoping to wait and get a seated next to the windows, our trip is in June.
That doesn't help on the food, but that is how we made our decision.