From what I've heard the safety standards are so different and often conflict that it would be difficult for the exact same car to sell in both markets. Bumper

From what I've heard the safety standards are so different and often conflict that it would be difficult for the exact same car to sell in both markets. Bumpers are mandated to be higher in the US because the average car is much bigger. I remember hearing a few others due to Americans being fatter on average and Americans tending to drive longer distances (maybe it was EU focusing more on pedestrian collisions where as the US focused more on car-to-car?)