Hello dear student, 

Both the Colleges are good you have to choose the best for yourself. While if you will still put emphasis then I would say bgs global medical college is better than Tripura Medical College. This is according to the ratings of the college. While I am attaching links of both the Colleges you can compare them on your own . 

https://www.careers360.com/colleges/tripura-medical-college-and-dr-bram-teaching-hospital-agartala/amp

https://www.careers360.com/colleges/bgs-global-institute-of-medical-sciences-bangalore

Kindly check these links . 

Best wishes