I'd think it's like comparing apples and oranges. They serve different food. I've seen a good review of the Tutto Italia recently, but I think Le Cellier is only hyped up because you can get...
1. Steak
2. In a theme park
3. Using only 1 table service dining plan credit
Le Cellier will also be tough to get into because of that. People book their ADR for it on that 180 day mark. It's possible to get in, but not very likely due to the popularity.
I'd like to try Tutto, myself.