Hello Saroo,
Both the universities have a good course structure and a brand name. However, as you are interested in litigation, I would suggest that you opt for Amity law. Pursuing a law degree from UPES is good for those who are interested in joining a firm and more importantly since UPES primarily deals in energy studies so it would be a good choice if you want to work as a lawyer in energy companies.

I hope this answered your query and all the best!