Heat oven to 350℉/177℃.
Spray a 10-inch tube pan with baking spray. Set aside.
In a medium bowl, whisk flour, baking powder, baking soda, and salt together. Set aside.
In the bowl of a stand mixer fitted with the flat beater, beat butter and sugar until light and fluffy, about 2-3 minutes.
Add eggs, one at a time, beating well after each addition.
Stir in vanilla and bourbon.
Add flour mixture alternately with sour cream, beginning and ending with sour cream.
Spoon half the batter into the prepared pan.
Sprinkle ¾ of the streusel over the batter.
Top with chopped apples.
Spoon remaining cake batter evenly on top.
Arrange apple slices on top of cake.
Sprinkle remaining streusel on top of apples.
Bake for 15 minutes.
Reduce heat to 325℉/163℃.
Bake for an additional 60-65 minutes, or until cake tests done.
Allow to cool in pan for 15-20 minutes, until cool enough to touch.
Turn out onto a wire rack to finish cooling.