Fantasia Gardens wins in a walk... especially if you are a fan of the movie. The theming is excellent - there are several holes for each segment of the movie.
We went to Fantasia Gardens in '99, then in 2001, we decided to try Winter Summerland. After playing it, we felt let down, so we went immediately from there to play Fantasia. Twice.
Its not that WS Land is bad, but there are nice surprises at Fantasia (watch out for Chernabog!).