The Differences that stand out to me is the lifestyle. Here are some observations that I've made while living there:
Europeans walk more/Americans drive more
Europeans value sit down meals with family/ many Americans eat in their cars, walking down the street, on the bus, and on the go in general. Also, many of us eat solo or in front of the TV
The European standard for quality of food is different. If it's not fresh or "just right", they won't eat it. However, American standards of food quality aren't as high. we'll eat lots of processed foods and canned & modified things that many Europeans would not touch. Also, most food in Europe is local, it's the standard. in The USA, you have to SEEK OUT local food.
Europeans are not "snackers", In the US, however, there is a massive market dedicated to snacks. From the "BK Snacker" to the "Snack wrap" to the massive selection of snacks available. I'd say we are a snacking society. You won't find that so much in Europe.
Homes are much smaller in Europe than in the US. Perhaps that is because there are very few places left to build.
Finally, national pride based on History and culture runs much deeper in Europe. The United States may be based on freedom, but the culture itself is made up of 2 things: Money and Showbiz. Remember, no European moves to America for the culture, they move here for the better paying Job, the business opportunities, the Bigger House, the Nicer car, and the Designer clothes. All of those things are so much cheaper and available here than on the rest of the planet, and that's O.K.! God Bless America!