It's really like comparing apples to oranges, because Crystal Palace is a buffet, and Tony's is a sit-down Italian Restaurant with a much different menu.
I really enjoyed my dining experience at Tony's (for dinner), but hated the breakfast buffet at CP. Again...apples and oranges....
May I suggest eating at BOTH????
If you can only pick one, I'd pick Tony's for the sit-down service. It's an oft-overlooked place, as it is right at the front of the park. We found the service, food, and atmosphere really enjoyable. CP seemd crowded and rushed.
Also, consider where else you will eat during your trip. A lot of my other fave places to eat at WDW happen to be buffet or family style (O'hana, Biergarten, Whispering Canyon), so the nice chance to sit down relax, and select from a menu might be just what you need!
ENJOY!
:wave: