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. 

The best way to determine which is better between AIIMS Nagpur and KEM Mumbai is to analyze the pros and cons of these institutes individually and then come to a decision.

AIIMS Nagpur Pros

• AIIMS Nagpur fees are very low around INR 5,856 fit the entire course (Mess not included)
• AIIMS Nagpur has all the nicer menu ties and infrastructure. Some of these include a Gym, 2 indoor badminton courts, a basketball court, a volleyball court, cricket and football ground.
• Hostel facilities are also decent with single rooms for girls and shared rooms for boys in the first year only. Every floor has a washing machine and the hostel is Wi-fi enabled
• Excellent connectivity with the nearest metro station 3 km away
• The academic environment is state of the art with labs equipped with modern instruments.

AIIMS Nagpur Cons

• Being a new AIIMS, it does not have a very huge orient inflow with limited clinical exposure 
• Being located on the outskirts of the city, you can go out only during weekends
• There is no student association and CR selection is done on the basis of marks.
• There aren’t many shops so you will have to depend on online shopping. 

KEM Pros

• KEM is a highly regarded medical college
• The PG of KEM is considered of high value in India
• The college offers a vibrant city life thanks to its Mumbai location
• There isn’t any ragging and the Bodh between seniors and juniors is strong
• Being old, the institute has an extensive alumni base 
• The patient flow is huge because of the reputation and location of the college.

KEM Cons

• Obviously, being in Mumbai you will have to bear a very high cost of living.
• The fees are very high. KEM Mumbai M.B.B.S. fees are INR 5.54 L
• There are no hostel facilities for first-year students.
• 1-year bond with heavy internship
• Not a good option for USMLE aspirants as there is a rule that prohibits you from leaving India for 5 years.

After weighing the above pros and cons I conclude that AIIMS Nagpur is a better option as its pros definitely overwrite the cons.

My answer is a bit biased towards GSMC as my brother is an alumnus of the same. However, I’ll try my best to justify my bias towards it.

• AIIMS Nagpur is a newly established college whereas Seth GSMC was established in 1926. It enjoys a better reputation than AIIMS Nagpur currently.
• As for the bond, GSMC is under the umbrella of MCGM, so you will be spared from serving the bond in a rural area and will have to serve in BMC Hospital.
• Because of its reputation, GSMC has a better reputation than AIIMS Nagpur and people from all over the country come here. 
• GSMC has some of the most friendly seniors you could ask for. They help you in every possible way and there is no ragging at all.
• As for USMLE, it requires guidance from seniors who have established themselves there. This is possible in GSMC because of a wider alumni base.
• GSMC has the latest amenities with well-established departments providing the best research opportunities. 
• The MLT and LTs are now fully air-conditioned. 

Ultimately, it’s best to look at the bigger picture and not focus only on the AIIMS tag. GSMC is better in terms of academics as well as reputation. No doubt, lack of hostel facilities does matter but not for someone who is ready to commit himself to the field.