There's a big difference. The Wonderland Tea Party is held at 1900 Park Fare. It is Alice and the Mad Hatter. Its just the kids and they love it. It cost $30.00. They have lunch, tea and dessert.
The Pretty Princess tea party is for the girl and her mother. It is held in the Tea Room at the GF. It cost $200 and the girls have tea with Aurora, get a doll and some jewelery. They have tea (finger sandwiches, desserts tea).
Mine have only done the Wonderland Tea Party. For both girls and I it would cost about $350 and DH would have a heart attack. For that price he would rather we rented the Grand I for the whole family, but those who have done the Princess Tea Party seemed to love it and feel it was worth the money.