Combine the sugar, salt and 1/2 teaspoon apple pie spice on a small plate. Pour 2 tablespoons apple cider on a second small plate. Dip the rims of two rocks glasses in the cider, then dip in the sugar mixture. Set aside.
Combine the ice, tequila, cinnamon schnapps, vanilla extract, lemon juice, remaining 1 1/2 cups apple cider and remaining 1/2 teaspoon apple pie spice in a blender. Blend until frothy. Pour into the prepared glasses and garnish each with an apple slice, whipped cream and a cinnamon stick. Serve immediately.