There are various differences b/w CSIR NET and UGC NET. Apart from their ultimate motive that these exams are being conducted for Assistant Professorship and JRF, nothing is similar in them. The National Eligibility Tests such as UGC NET, CSIR NET, all two entrance tests are initiated by the University Grants Commission.
From the very start, the CSIR NET is conducted by CSIR itself and UGC NET was conducted by CBSE, it was earlier under the hat of UGC, but now UGC NET Exam will be conducted by NTA. CSIR NET is specially designed for only those students who belong to the Science Stream whereas UGC NET is for all other types of courses in India.
The Bachelor degree candidates holding qualification in B-Tech, BS, B-Pharm (4 Years Degree) can appear for CSIR NET JRF but to appear in UGC NET Exam, they must have valid Post-Graduation Degree. The age limit for appearing in CSIR NET is 28 Years (General & OBC) or 33 Years (ST/SC/PWD) whereas, for UGC NET, it is 30 Years (General) or 35 Years (ST/SC/PWD/OBC). There are 3 sections in CSIR NET Exam (Part A, Part B & Part C) whereas the UGC NET consists of 2 Papers (Paper 1 & Paper 2).
The number of appearing candidates is more in UGC NET as compared to CSIR NET.