I voted for Chef Mickey's because we have had great meals there for breakfast. I know that has not been everyone's experience but we love it! The food was always hot and fresh and the characters spent quite a bit of time with us. We like the napkin twirling and dancing around. It's great fun.
We'll be doing CRT in August for the first time but I just want this one for my two nieces who love princesses and so I can say I've eaten in the castle. I don't have high expectations for the food or character interaction so hopefully both will be great and it will be my new favorite. My current favorite character breakfast is 1900 Park Fare. The food was great and the characters were not the usual ones you'd expect to see. DH still talks about the Mad Hatter to this day and it's been 1 year and 1/2 since we ate there. The Grand Floridian is a beautiful hotel and the restaurant although busy was pretty too.
Anyway, I think you should go with Chef Mickey's this time and try for CRT next time. This way you don't have to do the up early 60 days stress yourself out thing over CRT; you get to see Mickey and friends without waiting in any autograph signing lines; and you've got CRT to look forward to next trip. Whatever you decide, enjoy!!!!