The pastry sticky buns originated in Pennsylvania by German Settlers.
So sticky buns are sort of a German pastry but they actually originated in Pennsylvania but Germans who settled in Pennsylvania.
Sticky Buns and Cinnamon Buns are somewhat similar to each other but they are different in the way they are made.
Sticky Buns are usually less doughy and contains more brown sugar and usually are infused with nuts unlike the cinnamon rolls are.
Cinnamon Rolls are mostly less doughy than sticky buns.