TISS - Tata Institute of Social Sciences, Mumbai

Both are not good. Although TISS started MA in social Entrepreneurship and TISS is a reputed institute in India for social work, it has not got so much reputation for its social Entrepreneurship. same is case with its LLM program and in other hand I don't think ISB offers social Entrepreneurship course. A better suggestion for you to join a social sector organisation and after 2 years experience, enroll in MBA Social Entrepreneurship part time program of NMIMS as it offers lot of scope from presentation skills to case study, faculty from industry and from different sector. scan my blog blog.simplycareer.net for more details including review of the program as well as comparison with other institutes.

The Tata Institute of Social Sciences (TISS) is a social sciences institute with its main campus based in Mumbai, India. The Tata Institute of Social Sciences was ranked in top Indian universities, colleges and institutes in Social, Demography and Economics research by the study of Stanford University. It's following two courses are unique and best in India:
(a) B.A (Hons) in social work with specialisation in rural development
(b) Integrated BA-MA programme in social sciences
For these courses, students should have passed 12th class or intermediate in any subject stream from a recognised board. Students who have studied international baccalaureate Diploma and will be completing 12th class with clear results declared by June 2017 are eligible to apply.
Candidates who have appeared for their 12th class or intermediate final exams and are awaiting results are also eligible to apply. Final pass result should be produced at the time of joining the programme if selected.
Admission in above-mentioned courses is based on entrance examination and personal interview. As the number of seats are very less it is a very competitive examination.