They both have exactly the same ingredients, but one is vastly superior.
Why? Easier to eat. Most owners of pizza places whine and yell endlessly about employees using too much cheese and pepperoni on pizzas. Employees take out their frustrations by stuffing more cheese and pepperoni in the rolls. All of the delicious cheese n pepperoni grease stays inside the roll instead of making a mess all over the goddam box. Cold sauce > hot (temperature) sauce. Only conformists order pizza from pizza places.