Just my opinion, but I would choose PF 1900 because of the characters. They regularly have Mary Poppins (one of my favs), Alice in Wonderland, the Mad Hatter. I also like the Grand Floridian setting.
As for the food, I believe that both tend to be reviewed well.
I guess a lot of it will depend on what you're interested in as far as characters -- and what location is most convenient, as well. Cape May is a great place to breakfast if you're heading over to Epcot for the day. PF1900 is perfect if you're heading off to the MK.