For a variety of reasons we don't let you vote in our elections, and we chose not to pay obeisance to the appointed guy who holds title to your building.
Otherwise it's all the same thing, and Fur Shur the light and heat bill comes out of the local tithe.
What you refer to as "denominationalism" is mostly an ecclesiastical and not a theological question.
I'm pretty sure God is much more concerned with the theology.