Hi Sathish.
I guess you are referring to the 3 year LLB course.
The college from which you have done your law from does not matter till it is recognised from BCI.
If you want to pursue a litigation career or try for Judicial exams, the college whether private or government does not matter at all.
But if you are looking for a corporate job then a college which has good placements and good internship opportunities is a must.
The difference would be in the exposure the colleges provide in moots, internships, research papers, seminars etc which would mould your personality in a better way.