My family went to both during the week of Sept 8-13.
We enjoyed 1900 PF. My dd4 loved dancing with Prince Charming. Plus, you had a greater selection of food. The stepmom and sisters were hilarious. The only princess there is Cinderella.
My dh ate the Pork at PSB and he said it was good. dd4 had pizza but didn't eat it because she ate a huge amount of cheese and turkey off the cold bar. I had the Kjottake (sp?) and I did NOT like it. I ate off the cold bar because the cold salads were much better. Getting the photo package was very nice and seeing the princesses which should be about 4 of them. (Ariel, Mulan, Jasmine, Belle, Snow White, or Mary Poppins and Alice which we do not consider a princess. Some have seen Cinderella but we never have.)
Depends on if you are picky. If you are adventurous then go for PSB. IMHO, I would go for breakfast.