Dear Aashi, the syllabus, the reach for AIIMS, JIPMER and NEET are all the same. But what makes AIIMS and JIPMER stand out is their limited no.of seats and their reputation. But that no way means that  KGMC in Lucknow or a PDU in Rajastham, OU in Telangana are any less. When you appear for AIIMS, your goal is to secure a seat in the 1400 odd MBBS seats by competing with 3-4 lakh aspirants. With JIPMER the no.of available seats is 200 and Candidates appear in lakhs every year. When you compare NEET with these 2 entrance examinations, the numbers are slighlty in your favour. There are approximately 90,000 MBBS seats and the Government is planning on building 75 new Medical Colleges which will increase the no.of MBBS seats approximately by 10,000 atleast. 13 lakh students appear for NEET on an average. So now you should figure out what is your target reach among these 3 exams. Based on that you should prepare. The syllabus is the same but it is the way you prepare for each exam that helps you secure a seat. With JIPMER and AIIMS, you will need a deep knowledge on each topic including GK.