Akershus in Epcot/Norway is better for the total-princesss-immersion, but 1900PF is more fun because you've just got the Cinderella story. You get Cindy, her prince, and all 3 Steps (mom & sisters). A star-struck little girl will be happy to interact with Cindy and the Prince, and the rest of the family can have a lot of fun with the Steps.
1900 PF holds a special place in my heart because the last time we ate there WE MADE CINDY BLUSH! She managed to mistake my 18 yr old DD for a BOY. DD was furious, Cindy was mortified, and I was laughing so hard I almost fell off my chair. DD's hair is fairly short and t-shirts can be pretty unisex, but still........and not 5 minutes earlier, Prince Charming had stopped by the table. HE had no trouble identifying DD as a girl, and chatted her up quite nicely.