The main difference is up here in Canada we can grow very big straw crops and in Europe they do to but no bigger than ours. However with their cool weather they get way better head fill and much larger heads. The wheat over there thrashes much easier than ours, more like winter wheat. They grow 150 bushel wheat with the same amount of straw as our 50 bushel. Tough and wet harvest conditions allow them to not overload the shoe as easy as we do so the machines can run more hp. Here losses on most machines is the the limiting factor not hp, Which is why a lot of people aren't interested in running the big deere, 9120 or a claas 600, NH9090 over here.