Tutto
We are actually eating at both during our trip next month, but for different reasons. Last year, I enjoyed the relaxed atmosphere of Tutto and we all really enjoyed the food. We were not in a hurry, but the service was slower than other resturants. I don't always need to go, go, go at Disney. If we wanted to rush, we'd eat at counter service every meal.
Mama's was good too- love the pizzas. We are eating at Mama's because of the dinner package with Fantasmic (not a fan of the other 2 choices- kids didn't want more chicken nuggets as a choice!). It is more relaxed and faster service.