Hi,

I hope you are doing well

Older IITs will offer you a much better ambiance to grow (given that you have to be there for 4 years!). You get to feel the IIT culture (fests, events and societies). Also they have good placements. Mechanical is a core branch. Lot of scope in govt. jobs (read PSUs) too.

But in my opinion, you should go for CS. It’s a much better branch than mechanical in terms of pay packages and job environment. Lot of scope in private sector. Not much scope in govt. sector though. New IITs will give you ample opportunities ( less number of people). They have good infrastructure, if not better. Only their campus location can be worrisome (given that you have to be there for 4 years!). But with time they will develop.

So unless you have special interest in subjects like fluid mechanics, heat transfer, thermodynamics, mechanics, kinematics, vibrations etc. don’t go for mechanical.

All the best.