CRT breakfast, you get a pic with Cinderella downstairs and then you dont' see her again. You do get visits to your table from other princesses. When we were there we saw Belle, Jasmine, Snow White & Aurora.
At 1900 Park Fare, Cinderella comes to your table. As does the step-mother, step-sisters & Prince Charming. Cinderella and Prince charming dance together from time to time too during the meal.
My 5 year olds both loved 1900 Park Fare much more. They found it exciting to be at CRT, but they have both requested to go back to 1900 Park Fare again. The stepsisters really made this fun. They sing, they dance, they try to get people to not pay attention to Cinderella. They were just too funny.
So, I would think it would depend on what you want. CRT is pretty, it is being in the castle - my DDS thought that was very magical. . .however, the other (1900 Park Fare) is a lot of fun.
Good luck deciding.