They have a lot of similarities. Both are made from a sweet yeasted dough and are usually rolled out and filled with a sugar swirl. Typically, cinnamon buns are frosted with a thick vanilla icing and sticky buns are baked over a sticky layer of caramel sauce that becomes the topping. The syrup layer of sticky buns often contains pecans, but in this recipe, we’ve replaced that crunch with toffee bits.