I think, perhaps, the biggest difference is that in the US, it is common to talk about "police and civilians" and people being commonly arrested for "refusing a lawful order". Despite the nominal government structures, the US is more authoritarian with the jackboots and the UK is less so. I always found that funny. Not to say the UK is perfect but it's definitely better.

In Norway, if you're there when the kids finish school, you'll see them in their red jumpsuits/overalls and the interaction between obviously drunk young people and police is amusing to see. I saw a few with their arms around the police, sometimes playing by taking the police hats off and putting them on before returning them.

That is not a thing you would likely see in the US. Overall, I prefer living here, but I wish my children could have that sort of interaction with the police and not the sort you get in the US with dour-faced humorless golems ready to do violence at the slightest sign of personal discomfort.