WUSL or Vanderbilt?

I have received the LLM ad from WUSL and Vanderbilt. And I have to make the decision in a few days.

Three factors account for my consideration:
1.The reputation of these two schools. Most friends in China persuade me to WUSL. And friends in U.S. choose Vandy.
2.The quality of teaching. Since the tuition fee and living expense are closed in these two schools, I have no idea which one is worth studying.
3.The influence on my returning China. The student body is a very important factor in my future job.

Thank you very much!

if u mean alumni by "student body", WUSTL may be better in China