Having friends studying in both colleges makes me able to answer your question. Both colleges have convincing reasons and have been in existence for the longest time. 

Christ University offers excellent engineering programs and a highly qualified faculty. They also have an excellent campus. However, based on their online reputation, students are dissatisfied with the programs. 

Presidency University, Bangalore, has an advantage in this regard. The former students have nothing but positive things to say about the faculty. They are cooperative and helpful. The curriculum is always completed on time, giving students enough time to prepare for exams and assignments. It also has some of the best classrooms in the country, all of which are equipped with digital technology for enhanced learning. 

Hence, Presidency University is superior to Christ University Faculty of Engineering for B.Tech.

BIT Sindri is very good for CSE in many ways be it infrastructure, campus life, hostels or education. Few colleges have separate departmental buildings but BIT has a separate building for all its branches.

The reasons to choose BIT Sindri are as follows:

Reputation: BIT Sindri has been ranked 5th among the best engineering colleges in Jharkhand as per NIRF report 2023. The college is approved by AICTE and affiliated to Vinoba Bhave University.

Infrastructure: BIT, Sind offers world-class facilities that include multimedia auditoriums, seminar rooms, well-equipped modern laboratories, and a campus-wide network. The institute has around 80 laboratories for various courses and disciplines as well as 14 laboratories under the Unit of Excellence. Hostels are available for students.

Placements: More than 51 companies visited the 2023 BIT Sindri placements. The latest report is stated below in tabular format.

Campus Life: BIT Sindri offers you a well-established library with enough books from various branches and some competitive books for GATE and CAT. The school has many clubs such as HNCC, IETE, LEO, MODEL, ISTE, ROTARACT, and others. These clubs are dedicated to fields ranging from coding to art to social services. They provide a space for students to explore themselves and develop their skills. The college has a sports club which organizes cricket tournaments etc.

Alumni network: Dr. Ramjee Prasad. (6G expert, Aalborg University, Denmark), Prof. BN Mishra. (Former principal, NSUT) and many other eminent persons are famous alumni of that institution.

So, if you are planning to pursue CSE BIT Sindri, you must. Apart from good training, it also offers a good learning environment. All facilities and infrastructure of BIT Sindri are in good condition. So you won't regret joining.

If you are passionate about coding and want a profession in this domain, NIT Silchar is the right place for you-

1. Computer Science Society- CSS at NIT Silchar is the most active society of the institute. As a member of this society, your coding skills will be enhanced. CSS conducts coding classes for all CSE students. So if you don’t know programming yet, they will teach you the basics before the start of actual classes. By the second semester, you will be way better at coding than your peers in other branches. CSS also arranges coding classes by Oracle and other well-known companies.
2. Coding Club- Unlike CSS, the coding club is open to students from all branches. It conducts regular classes after college hours. You’ll be taught Data Structures during the first year. These classes are absolutely free of cost.
3. Coding Competitions- NIT Silchar regularly organizes web development competitions, coding competitions, and other fun events on campus. You’ll be encouraged to take part in these. 
4. Faculty- The CSE faculty teaches well. They will show interest in your caliber, your coding skills, etc.
5. Seniors- The seniors of CSE branch are really helpful and supportive.

Even if you don’t know much about programming, NITS will make you fall in love with it. The CSE department is absolutely great over there.