Thanjavur

For getting CSE at SASTRA one has to score above 95% in 12th and above 93 percentile in JEE Main. However you can get other engineering branches there. Since You Haven mentioned your category I am assuming that you are a general. In general category one have to score 50 percentile l for qualifying the JEE Main. Examination. You can apply for any stream. To get CSE in Sastra University your rank must be under 500 in stream 1 or 2. Though the cut-off rank varies every year, still you should have a rank under 500 to definitely get CSE in Sastra University. According to your percentile, your rank in JEE Main. Is going to be above 1,00,000. Programmes at SASTRA for which 25% weightage will be given along with the +2 marks for which the weightage given is 75%. This is for 70% of the total seats. They need to enter their JEE Main scores, whatever the scores are. Based on the information you have less chances for getting admission for CSE at sastra University.

In terms of fees, SASTRA Deemed University has higher fees than Chennai Institute of Technology. The total fees at SASTRA are more than 6 lakhs, whereas at CIT they are around 2 lakhs for CSE.
However, placement opportunities at SASTRA have been comparatively better, with students being placed in companies such as PayPal with a salary package of 24 LPA.
CIT also offers placement services for CSE, and its placement rate is around 92 percent. If you go by the NIRF ranking, SASTRA has the upper hand, being ranked 41st, whereas CIT is placed at 175th.
Also, SASTRA has around 300 seats in the CSE branch, whereas CIT has just 180 seats.
At SASTRA, academics are given more focus than extracurricular activities, and at CIT, you will have the opportunity to be part of events and festivals like Takshashila Fest.
Therefore, depending upon your preference, you can go to either of them.

Both are good. But according to branch, you can opt your choice. If u want to take CSE or IT or ICT then I can say SASTRA is best, because of the high placement opportunity. Nearly 80 companies will come every year. You will have a very good opportunity of getting a job with a high package. Companies like Microsoft, Paypal, TCS and many more will be available every year. SASTRA will provide hostel scholarship and merit scholarships of nearly 34k every year. The advantage SASTRA has is, being a deemed university, it can rapidly adapt to changing technologies. Syllabus is revised regularly (annually), with the feedback from the students and alumni (I have given feedback both as a final year student as well as an alumnus, and most (90%) of the changes suggested were implemented). The quality of students is pretty good. Nowadays, 70% of seats are filled by JEE Mains Scores. Hope it helps. If you found it useful then upvote or thumbs up my answer. Good luck.