Garden Grill is Chip n Dale, Mickey and I think Goofy. The restaurant rotates around the Living with the Land ride. The food is served family style. Salad. Meat, fish, veggies, potatoes, corn bread then a pudding with icecream on it. Quite simple food but we enjoyed it.
Tusker House is a buffet with a bit more of an interesting selection than the American based food buffets although nowhere near as varied or good as Boma. Lovely salads here. Characters are Donald, Daisy, Goofy and Mickey.
All character meals can get pretty loud but the Garden Grill less so as its not a buffet. Tusker House is certainly quite loud. I enjoyed both these places and have been to both three times with good service each time.