Dear student,

I hope you are doing well, there is not such distinction about teaching between private and aided college. What matters is whether these colleges are accredited college and the body that governs them. Most of the private colleges are expensive, what matters is what is being thought. Whether the course are something you want to study or not. Many private colleges are autonomous, as in the college design the course for the student. They have the freedom to do so and come up with subject that they feel is right, were as your aided college dont have such freedom they have to follow the rules strictly prescribed by the university or the government. The pluss point of aided college is that

1. Fee structure is low
2. Caste based reservations
3. Various schemes and scholarships are available

Such privileges you wont find at private institutions.

I can say for such both will teach you the best there is no difference but see to it that the institution you choose will benefit and help you with your studies and not burden you.

Hope this helps you.