Never been to Donald's. I think it is a buffet, so I am assuming it has similar items as other Disney breakfast buffets. Good tasting and a wide variety.
Having said that.... I would choose 'Ohana's. We ate there last summer and loved it. The food is served family style. The Mickey waffles were delicious. Our server allowed us to get the smoothies for our beverage. Strawberry and banana topped with whipped cream. Yum.
Lilo wasn't available on our day. We had Stitch, Mickey, Minnie, and Pluto.
Great character interaction.