Gauhati Medical College is ranked 39 whereas RIMS Ranchi is ranked 47 as per Careers360 ranking. Additionally, the fee at RIMS is much lesser than that of GMC, Guwahati. MBBS in Rajendra Institute of Medical Sciences, Ranchi has lower cutoff through NEET UG. Both are considered to be best colleges.

I suggest that you use the College Compare Tool to draw a comparison between the two colleges. The tool will draw distinctions based on various parameters such as fee, placements, infrastructure etc. and hopefully aid you in making the right decision which you need to.