Hey !

IIT bombay is not just a better college than IIT madras for aerospace engineering. Yet , it is one of the best colleges for aerospace engineering. And is at the first position among all IITs in this course

But note that none of the IITs have good placement records for aerospave engineers , so if you want placements , then go for other institutes like IIEST , shibpur , IIST , Tiruvantapuram etc.

Yes , but if you wang to oursue further studies like M.Sc , Ph.d then you can join IIT for aerospace engineering.

To know the best institutes for aerospace engineering , follow the given link :

https://engineering.careers360.com/colleges/list-of-aerospace-engineering-colleges-in-india

Hope it helps!