I played football and yeah...football isn't that much harder hitting than rugby. The pads make a huge difference in football. Gotta love that big hit sound in football. No helmets in rugby lead to less leading with the head so there aren't as many serious injuries but I'd bet that if you gave pro rugby and football players time to get use to the other sport...rugby players would end up winning both games.
Then why would rugby players take THAT big of a pay cut to play rugby instead of making millions and millions in the NFL?
For the love of the game? No effing way.