If I had to name it I would say the difference between US patriotism and Euro patriotism is that for the US it's more like "I'm proud of my country" and in Europe it's more "I'm proud to represent my country" as we take way less pride in our nations themselves. In fact, most of us are pretty negative about our countries. We take pride in heritage and kinship with our fellow countrymen, but not so much in the country itself, and the USA seems to be really proud of just being the USA first and foremost.