which is better BITSAT or an IIT ? And in what way?

Let's see what IITs has to offer:-

Research - It's beyond doubt that if you want to pursue research then IIT is definitely one of the best. (IIIT-H and IISc are on the same line). BITS is behind IITs in Research.

Reason - Huge funds in research funded by Central Government.

Let's see what’s great about BITS :-

Flexibility and freedom - Here BITS is better than any college in India.

Reason - Zero percentage attendance, No reservation, Flexibility about Courses, timetable, faculty etc.

Now its up to individuals, who is going to chose which college depending on which factor they are going to give first preference.

Why didn't I compare Other fields ?

Let's see why:-

1. Campus - Both BITS Pilani and IITs have excellent Campuses. They are at par with each other. Same goes for Fests.

2. Faculty - Excellent and Experienced faculty in Both these colleges. It depends on one, how much one can absorb.

3. Placements - Both the colleges have an excellent track record of Placements with best companies visiting them from around the globe. It entirely depends on the skill set of individuals.

4. CCA/Personal Development - Entirely individual dependent.

5. Startup - Both of almost equal opportunities to have a startup. While its easier to have a startup from BITS, hundreds of world-renowned startups from IITs have flourished(history says).

6. Tag/Brand Name - Well established fact that IIT tag > BITS tag. BUT BUT BUT if an IITian ever comes in Competition with a Bitsian with the similar skill set, no BITSian is going to get rejected. The reason is that both BITS, as well as IIT, are heavy duty tags. In foreign both are equally renowned and prestigious.

All the very best and good luck.