Hi
Firstly speaking, I would say both these institutes are really good and have built a reputation for themselves in India. Also aerospace engineering is a really competitive course so you will need a lot of passion to complete this degree. So I would say it's mainly on how you approach the subject rather than the universities. Both these universities have really good infrastructure, faculty, and other facilities. But speaking of current standings Indian institute of science Bangalore is rank number 1 so if you are selected in IISC Bangalore I would recommend you choose that over Indian institute of space science Thiruvananthapuram.
Good luck

IIST Thiruvananthapuram

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