I converted both IIM Ranchi and IIM Udaipur. What are some honest opinions because both have almost comparable rankings and placement reports?

The decision of choosing a college should be taken at an individual level. You can seek advice from others but not ask them to decide for you. Try to analyze what exactly you want from your MBA program. What is it you are seeking and how to achieve it? Once you are sure about that, college does not matter much. 

Honesty both the IIMs you mentioned give an edge to each other. Still if I would have to choose one, I would go for IIM Udaipur because of its recent success stories. IIM Udaipur has seen a rise in international rankings like QS and FT. Earlier these rankings included only the top IIMs A, B and C. IIM Udaipur has proven its worth by appearing on such international rankings. It is also the youngest B-school in the “world” to be featured in the FT MiM Rankings.

IIM Udaipur is heaven for a research enthusiast. Its premium research culture is the reason for its recent rise in rankings. As far as placement is concerned, both the colleges have similar statistics. The table below has drawn a comparison between the two.