Hii!
CSIR NET and UGC NET, both the exams are conducted by National testing agency ( NTA ). CSIR NET is mainly for science stream pass-out candidates whereas, UGC NET focuses on a total round of subjects, that is, Art's, languages and overall approach.
So, I would suggest you to go for CSIR NET if you satisfy the eligibility criteria. The link given below will help you with more information -

https://www.google.com/amp/s/www.careers360.com/question-what-is-difference-between-csir-jrf-net-and-csir-ugc-net-exam/amp

Hope this helps.
Good luck!

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