The US rangers are much different than the ROW (rest of world), they need to meet US crash standards.
The frame instead of C rail is a complete box frame, and it has steel front and rear bumpers. In addition it is optioned differently (to a higher standard) and has a lot of other differences. I’ll see if I can find a list.
Even the most basic engine in the US is still more than the top spec Australian engine.
https://social.ford.com/en_US/story/...rd-ranger.html