Hello Rajnath,Both the colleges are perfect,all the students reading and learning over here are the top notch rankers of the entrance exam.

Teaching,faculties and curriculum is best and equivalent to each other in both the colleges.

Hostels are though not soo good,bathrooms and foods are quite bad.

There is a bit of ragging in both the colleges so be prepared.

Alumni network is quite good in OU,JNTU also have but a bit less but both are good.

Now prefer that college which is nearby to your home and as per my views i would give a bit of plus point to jntu as i have heard that there are few riots in OU.(ALTHOUGH I DON'T KNOW 100% I HAVE LISTENED).

Also try to search for few private colleges as there are few private colleges too which are good.

Hope this helps you 

All the best for your future