When it comes to working in the US and in Britain I think one of the main differences are that they are more "open" and outgoing. They are less formal and I also think Britain is more strict. Of course this varies from where you work. Especially I think you have to be more formal with your boss in Britain than in the US.
I also think there's more opportunities in the US, and harder to earn good money in Britain.
You might be right about that although it is hard to now for sure before you actually work in one or both of the countries. I would imagine there would be a lot of difference within the countries too depending on what branch of work you are in.
SvarSlett