1Heat oven to 375°F. Spray 12-inch pizza pan with cooking spray. Place cereal in resealable food-storage plastic bag; seal bag and crush cereal with rolling pin or meat mallet (or crush in food processor).
2In medium bowl, mix cereal, melted butter, 1/4 cup sugar and the vanilla. Press evenly on bottom and 1/2 inch up side of pizza pan. Bake 10 minutes.
3Just before serving, in medium bowl, beat cream cheese, 1/3 cup sugar and the almond extract with electric mixer on medium speed until smooth. Spread evenly over cereal mixture. Spread with pie filling.
4In small microwavable bowl, microwave semisweet chocolate on High about 1 minute or until chocolate can be stirred smooth. In another small bowl, repeat with white chocolate. Drizzle chocolates over filling; cool slightly. Cut into wedges.