KGMU has always been a very attractive option for medical aspirants.
It has a good infrastructure and reputation. It is considered as the best medical college in UP. I don’t have much idea about AIIMS Jodhpur, but it is considered the best after Delhi. Personally though, I consider AIIMS Rishikesh a better choice due to its pleasant location.
Recently, the UP government has passed a compulsory bond for UGs and PGs. It is a compulsory 2 years rural posting bond. This is a huge drawback in choosing KGMU Lucknow. The rural posting will be a difficult time, and you won’t learn much from it. There are safety concerns as well.
For your MBBS, you should choose between the two based on personal preference. But I would recommend you go for AIIMS Jodhpur.