I'm seeing the opposite as expressed here in terms of milage. Most of the Japanese bike owners I know ride much more than the Harley owners. I've tried the poker runs,and organized rides,but stopping every 15-20 mins isn't for me.
Most Harley owners never sell due to the cost of getting into another, most Japanese bikes are flipped for something new to ride. I've heard Harley owners wishing they mouth a cheaper just as good Japanese bike,and Japanese bike owners wishing they spent more for a Harley.
Maintenance is a whole lot of what ifs,how it's ridden,and what's done for basic maintenance.