See both the colleges you have asked about are not only famous colleges but they are relied by many patients. Now as you have asked to compare it then from a point of view of medical professionalism, the most important factor while selecting a medical college is the clinical exposure. The more clinical exposure you will get, the more you will be benefitted. Now from different reviews available, UCMS is a better choice in terms of clinical exposure. It has really good inflow of patients and there are many complicated cases comming in, which can give you really good experience to the field. So I would recommend from any other perspective there are not much of a difference between the two colleges. But if you wish to go for one which gives you extra benefit then go for UCMS as it has a better clinical exposure compared to that of GMCH.

To know more about UCMS visit the link below:

https://www.careers360.com/colleges/university-college-of-medical-sciences-university-of-delhi-delhi

To know more about GMCH visit the link below:

https://www.careers360.com/colleges/government-medical-college-and-hospital-chandigarh

I hope this answer helps. All the very best for your future endeavors!