It would be better if you could tell what particular information you want for AIIMS Patna and Rishikesh and generally if you talk about about its ranking and reviews then as per Careers360 analysis, both have got AAA+ which says these are the good option to pursue MBBS program from there overall whether you talk about student quality, research output, impact, learning, cut off trend etc.

For reference, you can go through teh below links -

https://medicine.careers360.com/colleges/all-india-institute-of-medical-sciences-patna

https://medicine.careers360.com/colleges/all-india-institute-of-medical-sciences-rishikesh

Good Luck!!!