Seriously? Come visit Alabama and Washington. Culturally, they're as different as any two countries. I've been to Scotland and France, it's a comparable level of difference, if you look past the language barrier.

Language is an interesting subject in the US, as we only have English as the de facto national language, not de jure. Some of our states actually do all their legal work in joint English and Spanish, such as New Mexico and Texas, when it's behaving.

Also, stay consistent buddy. The EU is not twice as populous as the US, it only has around 500 mil, which while more, is less than what you linked to, which was Europe the continent.