In large bowl, beat cream cheese and 1/2 cup brown sugar with electric mixer on medium speed until smooth. Beat in egg, 1 1/2 teaspoons vanilla and 1/4 teaspoon pumpkin pie spice until smooth. Stir half (about 1/2 cup) of the caramel mixture into the apples; pour into pie. Mix pecans and chocolate chips; reserve 2 tablespoons for topping. Sprinkle remaining pecan mixture over apples. Fold remaining caramel mixture into cream cheese mixture, and spread over pecan mixture.