Dear aspirant, both the AIIMS are similar in the aspects of teaching and facilities. As the interaction with the patients start from the second year only so if you are a fluent hindi speaker then bhopal will be good as well otherwise you can face a problem in connectivity with patient's patients. Other aspects can be taken into account as well like the connectivity to your home. In both the institution fests are good as well.

Hope it helps.

All the best:)