In some ways Americans and British people would seem very similar at first glance. We look very similar, wear similar clothes, share the same language, and have some shared historical connections (including one that America is celebrating today). However, beyond just the fact that we use a lot of different words to mean the same things, or all the accents you would have to get used to, there are also many cultural differences and quirks that would instill culture shock in anyone who decided to jump across from one side of the pond to the other without doing their research first.