Garden Grill had a cinnamon roll bake, then eggs, ham, tater tots, Mickey waffles with Nutella syrup (you could also use regular- they provided both), and I cannot remember if it was bacon or sausage or both... It was good, and you could order more of anything you wanted. Like I said, the character interaction was good there as well (Mickey, Pluto, Chip, and Dale all dressed as farmers).
Crystal Palace has some original dishes- the puffed french toast is in the kids section, the breakfast lasagna is near the desserts, and there are a few egg dishes on the line along with the usual waffles, pastry, and fruit. When we were there it was a Philly Cheesesteak egg dish. It is good, but I think I'd personally prefer Garden Grill.
At Garden Grill, you could not really mess it up- but I would not consider it really adventurous. The Nutella syrup is good, the cinnamon roll bake was just ok (though ours was not super hot, so that may be why), and I cannot think of anywhere else you can get tater tots at breakfast on WDW property. I also prefer all you care to eat over a buffet- at least at breakfast.
I will say that my favorite was 'Ohana. Bacon, sausage, eggs, biscuits, potato wedges, fruit, Mickey (and Stitch) waffles, and Hawaiian bread. Plus, if you like POG juice, they serve that along with coffee.
