If someone is getting Maulana Azad Medical College and all AIIMS, other than AIIMS Delhi then what should that person choose?

This answer may vary from person to person but Maulana Azad Medical College (MAMC) is a well reputed and much older institution. Hence it has years of educational experience. On the other hand the AIIMS are relatively new and require a lot to learn and develop to be considered at par with MAMC.

MAMC:

• You can totally rely on the things taught here. As all the classes are taken by some of the experienced teachers.
• Their years of experience provide proper guidance on how to approach any situation.
• They have a gigantic campus, attached to notable hospitals like - Lok Nayak, GB Pant and Guru Nanak Eye Centre.
• There is a 50% DU quota for PG admissions.
• They have a batch size of 250 students, which at times could feel crowded.
• Being in Delhi, it has access to many good coaching institutes.
• Getting proper accommodation may take time.

Other AIIMS (except New Delhi):

• Campus is almost new and has well equipped labs and equipment.
• Almost everyone gets a hostel from day one and hostels are really in good condition.
• Batch size is small.
• Faculties are a mixture of new and experienced professors.
• AIIMS Patna does not offer any PG courses.
• Except AIIMS Bhubaneswar and Bhopal, other AIIMS do not offer PG degree in all courses.
• AIIMS Guntur and Nagpur function from their temporary campus. 
• Many departments in other AIIMS are not fully functional.
• There is less accessibility to good coaching institutes for PG preparation.
• There is no 50% institutional quota.

Therefore, MAMC, overall, is much better and reliable as an institution. MAMC promises certainty. So it will be better if you go for MAMC. AIIMS Bhopal, Bhubaneswar , Jodhpur and Rishikesh are developing fast, but AIIMS Patna, Raipur, Nagpur and Guntur are still lagging behind.