Should I stay in the U.S or move to Vienna Austria ?

That's an odd pairing. Austria is a small country, with beautiful mountains and good skiing. But it's expensive, and there are a lot fewer options in terms of jobs and housing.  The US is vast- there are such huge differences between the north and the south, the east and the west, the cities versus towns versus the country. We can't really compare unless you're more specific. 

If you don't have a work visa, student visa, or are independently wealthy, it's just not going to happen so there's not much point in yakking about your dreams here.

I think that you should move to Germany it is way better then Austria  I used to live in Austria and then I moved to Germany it is WAY better because in Austria you would have to speak 77777777 different languages

How is your German and educational / work background ?

Irrelevant of which is 'better' - is Austria an option?

Ie do you meet the work visa requirements, and do you speak the language/s?

Keep you visa and move temporarily to see

If you like it and it works for you. If it doesn't

Pack up and leave. Good luck

I don't think anyone here can answer this for you. YOU, yourself have to try and figure out what could be best for YOU and decide what YOU wanna do

If you're coming here to ask us to make critical life decisions for you based on knowing entirely squat about you or why these would even be your only options, then I'd suggest you migrate back to your parents' basement.

Vienna Austria is very nice but you will get bored there as everything works like clockwork and you will not have anything to complain about, you will not even ask for the manager not once ever. A country that is so perfect and clean will make you bored very quickly.

You have effectively zero chance of moving to Austria as an American unless you marry an Austrian citizen who qualifies to sponsor you for an immigration visa.