Hi there,
The question is a little broad, so let me break it down a little. There are many factors you will want to consider:
1) Where you want to work after school. If you want to work in NYC, your best bet is to go to an East Coast business school. If you want to work in Silicon Valley, look at Stanford and Berkeley. If you want to work in Europe... you get the picture. Going to school in Europe will make it MUCH easier to find a job in Europe. You should check your prospective school's career fair page to get a sense of who recruits there.
2) What skills you need to get the job of your dreams. If your career goals revolve around international business, and you have never studied abroad, Europe may be a great choice.
3) For rankings, check out a publication like US News and World Report B School rankings. There are institutions on both continents of all tiers. So, rankings shouldn't be much of a factor in your Europe vs US decision.
4) European teaching style is different than US. In my experience, school is a slightly more formal affair in Europe. Challenging the professor is not encouraged in Europe, while being an "independent thinker" is more encouraged in the US.
5) The network is one of the most important things you will get out of any business school. Where do you want that network to be based? Should it revolve around a certain industry? Draw a Venn diagram... this may then narrow your search to schools in Europe that specialize in finance or West Coast schools that specialize in Marketing, etc.
I went to school with Europeans when I studied abroad in Mexico. I know many of them went on to top companies like Dannon and Air France. It was an invaluable experience for me to work in groups with them, as I learned that teamwork requires different things when working with different people. The most important lessons of my study abroad did not come from the curriculum, but from working with and listening to my classmates.
I hope that helped,
Tatiana
Tatiana Becker | GMAT Instructor | Veritas Prep