NEET PG is like any other entrance exam. So the UG college doesn’t really matter when giving your PG entrance.
But it is true that your clinical postings have a bearing on the things you remember when reading your preparation material. Your exposure to clinical signs, diagnosis, radiological findings, and surgical procedures makes you remember things. A dedicated faculty, motivated peers, and hardworking seniors will have a huge impact on you. Good seniors offer tips and tricks on cracking entrance exams.
Coming to KMC Manipal, it is a premiere institute. It is at par with most government medical colleges. The alumni of this college can vouch for its good academics and campus life.
You’ll have to prepare for your PG with efficiency and diligence. Your UG college won’t have much of a role in this regard. KMC Manipal is a good choice for an MBBS, and it will offer you all the facilities and exposure.