Think it will end up closer to the NFL. Where spending ends up roughly equal due to the market being maxed out and thus it turns into a quality of management thing.
Eg Green Bay have the smallest market but have won multiple Super Bowls, yet the Jets have a massive market (NYC) but have a history of massive mismanagement.
Difference between us and the NFL though is their fixture isn't as compromised anywhere near as much as ours, so they start from a more level commercial playing field from the get go.