Hello Munawar!

Going for better colleges through NEET is highly recommended instead of joining newer AIIMS. What, finally matters is your knowledge and how much practical exposure you'll get. For practical you need good amount of patients reaching out in your Hospital and patients usually reach that place only which is older and famous. 

So, finally it is advisable to join a better older college which us famous and has lots of patients reaching out there.

Check out the college predictor for a clearer idea of what colleges you might get.

https://medicine.careers360.com/neet-college-predictor

Hope that helps!