Indian Product companies v/s US Product Companies

Is anyone working or has worked for US based product companies as a Product Manager?

If yes, then needed to understand the following

1. Work culture and office hours
2. Type of work compared to top Indian product companies
3. Did you go down in your designation compared to previous designation in an Indian product company. Was it worth as you would have a better designation in India during that time period.
4. Long term prospects of getting called to work in US permanently or short term.

Would be helpful as I am evaluating a job opportunity.