B.Sc. (Hons.) in Zoology 

at B.D. College, Patna

Yes Patliputra University Offer better placements than B.D. College

As the highest package offered in B.D College was 5 lakhs 

and the average package was 3 lakhs.

But in patliputra college many top companies visit the campus for placement 

The highest Package offered was 18 Lakhs

Median Package 10 Lakhs

But, to get a job in top companies depends on the skills of individual itself.

Technically, B. D. college is a part of Patliputra University. There's many colleges under Patliputra University and some of them are bound to have different fee structures for various services they give. 

Though Fee structure of B. D. College is not completely available at it's website, but as per other sources, There's comparable fees in most courses among many colleges, but you have to look at the course and specific colleges you are looking at to compare, as there are some which might be a bit more expensive in one over the other and converse for some other course.

Hope that helps

B.D. College offers various courses like M.Com, B.A, B.Com, B.Sc, MBA/PGDM, MCA in Accounting & Commerce, Humanities & Social Sciences, Science, Business & Management Studies, IT & Software stream. B.D. College has specializations such as Mathematics, Physics, Botany, Zoology, Chemistry, Hindi, English.