We have been to both.
Via Napoli - way too loud and noisy. We are NY pizza snobs, so we didnt care for the pizza. Asked for the salad and they said, after much of a hassle, they would give it to us since dh was ordering pizza, but its only suppose to be for 2 people ordering pizza.
Service was way slooow. We even missed Illuminations because of it. Waiter disappeared and we had to wait forever for the drink refills
My eggplant entree was more like an appetizer serving compared to regular restraunts we eat at.
Only good thing about it: entertainment watching them make the pizzas and the pizza oven
Tutto Italia - fun waiters and bigger portions. More expensive. Better decor, atmosphere etc.