I consider them in-between, but closer to a cupcake - I eat them as dessert. - My husband
likes them without the chips inside, and with semi-sweet icing, so the icing technically would make it a cupcake no? I prefer them without the icing, and with the chips inside. Regardless, it still tastes a little closer to a cupcake to me.
Ya know, this debate of muffin vs. cupcake has been going on forever, and as far as I know, the old fashioned muffins were denser than a cupcake, but today they all cross over.