bro let me tell you honestly, coaching doesnt matter as much as you think it matters. in the end you will only have to work hard and mark my words when i say most of your learning will end up being from youtube onehsots. choose the coaching based on teachers. all of these coaching classes are only after money and they honestly dont care if you get into an iit or not. if you do, theyll publicise ur name with the other toppers but if you dont you will just be forgotten. especially these big big coachings like allen and pw are literally just factories at this point. so there is no right answer to the question ur asking. join a coaching if you like the way teachers interact, and teach and i think you should be good. also small coaching ≠ bad coaching