Differences between Norwegians and Finns, and Oslo versus Helsinki?

I guess I'm asking two different questions.

One about the general vibe and differences between the people and societies. And how it is in both countries to find/make friends, dating, socializing, etc.

And the other is about the differences in living in both cities.

And yes, I know Oslo is more expensive and Helsinki has slightly worse/longer winters. I meant information other than stuff like that 😅.