I think that in America you can travel longer disdtance to see smaller changes in habits and living styles, while in eurppe you travel smaller distances and nevertheless already see a greater change in places and habits.
Just considering language alone you would realise that it makes a smaller difference to travel from Boston to Seattle, then it makes a a difference to travel from Kiel to Kopenhagen.
Now consider history. Laws. Currency. Cuisine. You can see a "huge difference" when comparing Bavaria in germany's south with friesland in the north, at the coast to the Northern sea. And still it is the same country, and the difference does not match the scale of the difference you see when leaving you8r country and going to a completely di9fferent one.
Have you realised that you just gave evidence by your example, probably without realising it, for what I described as the "empirial attitude" that thinks the empire's heart already includes all that is worth to be seen, in my first reply, on the very top?