Norway, Sweden and Denmark share a lot of commonalities. We share history and language, but differ in small ways. My Norwegian language, bokmål, is a bastardisation (or so they say) of Danish, a result of being a colony of Denmark for 400 years. We were the farmers, they were the culture, education and high society. But.. we have forgiven them:)
One way we differ are church architecture. While many, though not all, of our churches are made from timber, stones and bricks are typical for Denmark. A practical reason, I guess. Norway have a lot of woods, while Denmark... not so much.