IT at IIITA has several advantages over CS at the NITs. I will be explaining these advantages in detail for you-

At IITs/NITs, the first 2 semesters have a common curriculum for all branches. For the rest of the semesters, the core courses are accompanied with some useless courses. 

Take NITK for example. From the 3rd sem, B.Tech CS students at NITK are taught additional courses like Chemistry, Engineering Science, Manufacturing Process, Humanities, etc.

IT at IIITA has the same core courses in its curriculum, without any additional ones. You’ll get many electives in 6th and 7th sem, and more projects to work on. 

Some courses from the curriculum are- Electronic Devices & Circuits, Circuit Analysis and Synthesis, Data Structures, Digital Electronics, Computer Organization and Architecture, Theory of Computation, Object Oriented Methodologies, etc. B.Tech IT at IIITA has more hardware-related topics than B.Tech CS at IITs/NITs. 

Due to these reasons, IT at IIIT Allahabad is much better than CS at all NITs.

IIIT Delhi offers both electives and mandatory courses. Students are at freedom to make a choice in case of electives while there is no such choice in mandatory courses.

Now, the best part of the CSE branch at IIIT Delhi is that it has the maximum elective slots of any other branch. So, students get to choose electives from a wide range of courses like

•  AI
• Systems
• Security
• Design
• Electronics
• Economics

CSE will offer more academic flexibility than CSAI. CSAI will have some mandatory AI electives which might be beneficial if you are interested in the field. Also, you won’t have to study useless courses and can focus on AI. However, you will be restricted to the AI field, unlike CSE which gives you enough flexibility to pursue the field of your choice. Unless you are certain of your interest in AI, it’s best to choose CSE. 

I will restrict my answer to Engineering Physics and Chemicals only as I know the same only. 

• The major criterion followed at IIT Delhi by all the branches is a well-maintained CG. To secure good placements one has to constantly score a good CG throughout the program.
• During your admission, the department does not play any role but your 85 percent constraint on minimum possible strength does.
• Engineering Physics is a unique branch for those highly passionate about Physics and want to pursue higher studies in the same
• To secure core jobs, one has to move to MTech in Engineering Physics from BTech in Engineering Physics.
• For Chemical Engineering students, BTech is more than enough to secure decent packages and great research opportunities outside India.
• Consultancy and Analytics jobs are offered equally to students of all the departments 
• Engineering Physics graduates usually take up consultancy or IT jobs 
• Chemical Engineering is the most laid-back department of IIT Delhi with very flexible academics thus making it easy to maintain a decent CG throughout. 

I wouldn’t suggest anyone go for Engineering Physics if they have no intention of pursuing it later. Instead, look for other options in BTech and explore your interests.

When it comes to leniency, MG University tops the list. The evaluation process here is quite liberal compared to other universities. You get multiple questions to choose from. It allows you to choose as many as 40 colleges at the time of allotment.

Kerala University, on the other hand, is well known for its harsh evaluation and unfriendly student policies. It believes in the orthodox methods of evaluation. Many times the exams are scheduled earlier than usual despite the syllabus still standing incomplete. Certain times a major percentage of students failed courses like BA (Hons) in English.

Calicut University has a major drawback of frequent postponement of exams and result declaration dates.

In the end, you must know that marks are not what defines your education. Your knowledge, teaching procedures, faculty, curricular activities, and general ambience of the university have a lot more to do with your education than any other things. If you are open to challenges then Kerala University is the best option for you.

I have friends from both NIIT University and Manipal University. Based on their experience, I will say NIIT University is better. Here are some advantages of joining NIIT.

• NIIT offers decent academics in the field of technology. Their CSE branch is especially good.
• The green campus, surrounded by Aravali hills, is a treat for the eyes.
• The faculty pool is supportive and friendly. You can reach them, for any help you need regarding academics.
• On-campus you will meet students from all over India. Also, since the batch size isn’t huge, you will get to know your batch mates well.
• NIIT is an IT Education space. So, the industry interface is great. They have industry visits, guest lectures, industry-oriented curriculum. 
• It has a good placement record. During 2021 placements, NIIT University's highest package was INR 24.08 LPA. 

Overall, NIIT University is a good option for pursuing an engineering degree.