In a large bowl, combine the brown sugar, applesauce, coconut oil, and softened butter for the coffee cake. Mix with a spatula until the butter is almost completely mixed in, leaving some small chunks for added texture. Mix in the Greek yogurt, sour cream, and 1 teaspoon of baking soda. Add the all-purpose flour, whole wheat flour, beaten eggs, vanilla extract, baking powder, the remaining 1 teaspoon of baking soda, and salt. Stir until the batter is well mixed and a light brown color. Stir in the seedless raisins until evenly distributed throughout the batter; the batter will be thick. (20 minutes)