Djv there will be a lot of generalisation here but most of it holds true IMO.
If you are looking purely for more bucks, don’t do it, look at the Middle East. Most Europeans earn less than their American counterparts. Taxes also are higher and unless you live in New York or somewhere similar property prices will scare you senseless, okay that’s the bad news.
Most things are covered in Europe, for example France has a fantastic health service and public transport is far better than anywhere I have been in the States. Most of Europe and France especially has far more holidays (paid) than you will be used to and your hours will almost certainly be shorter and workers seem to have far more rights in Europe.
Europe also offers a great opportunity to travel, Paris has two major airports and in two hours or under you can be in anyone of about 20 countries and with the “budget” airlines this will be for about $150 US or less return, much less if you book early, so weekends can be great, if that interests you.
Again a huge generalisation but Europeans seem to spend more on food, drink and free time and less on luxury items than Americans, not to mention hospitals, lawyers and collage funds ;-)
So in short if it is all about money don’t, if you see it as a life experience, find out as much as you can, cost of living, local taxes, property prices and the like. One final thing English is not spoken by all, again you can see this as a pain or an opportunity.
Good luck with your research and I hope you make the right decision, whatever that may be.