We just got back from DL and did both meals. We enjoyed the Minnie a bit more as we saw a lot more characters and they came around around the entire time we were there. We saw Minnie, Eeyore, Pooh, Rafiki, Max, Hook, Peter Pan, Fairy Godmother, Tigger, Chip and Dale. My kids got to see everyone, pose for pics, etc. And some of them came back twice. Hook and Peter Pan put on a spur of the moment show b/c Peter came out the CM door. Eeyore and Pooh danced with DD on the way out the door. Food was great.
Ariel's Grotto was fine, we saw CInderella, Ariel, Sleeping Beauty, Snow White and Belle. They all came by at the start of our visit, for a brief photo and signing, then we didn't see them again. For more interaction, choose Minnie or our favorite, Goofy's Kitchen!