Choose the course that interests you, college is a secondary thing. Here are some of the facts that may help you in choosing the right branch for you.

• If you want to work in PSUs or Govt. sectors, it’s better to not choose Production Engineering as there are fewer recruiters.
• Jadavpur is the best college you can get through WBJEE. If you choose Production or Power in JU, you will have good on-campus job opportunities.
• Production Engineering is a branch of Mechanical Engineering itself. The syllabus will be more or less the same. 
• Mechanical at Kalyani University will be slightly better than Jalpaiguri. You may not get lucrative job packages at on-campus placement from Kalyani University but in the long run, you will have a much better hold with your Mechanical degree. You can expect well-paid jobs in the future. 

Your future will depend on the branch you are choosing so choose according to your interest. All these Universities will offer you enough opportunities and resources to prosper. It’s up to you to use that well. 

Based on the opinions within the medical community, I will provide some information on these colleges-

1. GSMC- It is a highly renowned college. High rankers in UG and PG entrance choose it for pursuing their medical studies. Clinical teaching is very good over here. 
2. Grant Medical College Mumbai- It is one of the top 10 medical colleges of India. But its fees have skyrocketed recently. The campus is not in a good shape too. However, this college is one of the only 5 colleges whose degrees are approved in Singapore. So if you plan to pursue your PG abroad, a degree from GMC Mumbai will open the doors of Singapore for you.
3. KGMU- It is one of the best medical colleges in North India, and especially UP. It is well reputed, and the campus is really good. The infrastructure is top notch, better than most government colleges. The teachers are decent, and the students are hardworking. You’ll get a good clinical exposure over here. For an outsider though, adjusting to the UP culture might be a little difficult at first.

I don’t know much about GMC Patiala and GMCH Chandigarh, so I won’t comment on these two. 

Make sure to choose a college with hardworking students. Good company will motivate you to study harder and excel in your field. Food and language barriers aren’t much of a problem in the long run. 

Rather than giving you a direct answer, I am going to evaluate all The aforementioned institutes individually on the basis of some common parameters like placements, brand name, campus life, opportunities, and alumni.

IIT BHU ECE

• Core placements are rare and students mostly build their profile for software development companies by becoming proficient in various programming languages, doing competitive coding, doing projects, and trying to build a computer science-inclined profile. A handful of students target core engineering roles.
• The brand value is similar to other colleges mentioned
• The campus is rather old and might disappoint freshers expecting a good college life.

IIT Guwahati ECE

• Unfortunately, I have no knowledge about this Institute. However, I recommend you contact the seniors of IIT Guwahati for the same.

IIT Hyderabad Maths and Computing

• Usually, MNCs attract top-tier software and financial services firms. If you are a hardworking student, it wouldn’t be difficult to secure amazing offers at top firms.

IIIT Hyderabad CSE

• IIIT H has possibly one of the best computer science departments in the country. 
• You have to do core computer science courses right from the first year.
• Many students get selected for Google Summer of Code and IIIT Hyderabad has its alumni in top-notch firms. 
• Being highly academically oriented, IIIT Hyderabad has minimal campus life and extracurricular activities.

Ultimately, it’s a matter of preferences and what you are looking for in your degree.

Irrespective of the IIT you choose, CS placements are excellent everywhere with very lucrative packages offered to its top rankers. A good student can pay a package as high as INR 30-40 LPA in CS whereas the same students will only end up with a package of INR 10–15 LPA.

While many may comment that placements should not be the only determining factor, I am here to contradict that opinion. CS is a branch that is dynamic and any engineering aspirants will be attracted to it naturally while other branches are a bit rigid and require specific attention. 

As far as CSE at IIT BHU is concerned, it’s at par with most older IITs. The majority of the batch is pre-placed or placed on the first day itself. A few top recruiters include Goldman Sachs, Oracle, Microsoft, etc.