The choice depends on what matters the most to you. 

If placements, faculty and research opportunities are your top most priority, choose IIIT Delhi CSE. In this respect, IIITD CSE beats DTU Mechanical by a large margin. But if you want the best of campus, college environment, cultural fests and brand name, DTU Mechanical is a much better choice. 

I would personally recommend IIIT Delhi, as it offers top notch placements. But if you’re truly passionate about Mechanical, choose that branch. Do not take your interest for granted while choosing your branch/degree.

My cousin graduated from DTU in CS. According to him, these institutions can be ranked for CS in the following order-

1. DTU
2. NIT Calicut
3. IIIT Allahabad
4. NSIT (now NSUT)
5. IIIT Delhi
6. DAIICT

DTU is considered one of the best Indian institutions for CS. Therefore, you should go for DTU if you get the opportunity. Every technical society at DTU, be it IEEE, ASME, CSI, IET, or even the small ones, gives great value to coding competitions. Thus, coding classes and competitions are held on a regular basis.

For those who want to work on real-use-productive coding instead of passive-competitive coding, there are many opportunities at DTU. DTU has several societies, and there are student entrepreneurs who are always in dire need of talented coders. 

DTU also has a locational advantage. Being situated in the capital of India, it offers students great opportunities and exposure, not just industrial but of all types. Gurgaon is the IT hub and since you will spend 4 years of student life in Delhi, if you land a job in Gurgaon after graduating, you will have been accustomed to the region by that time.

The seniors at DTU are helpful and there is a strict anti-ragging policy on campus. The faculty consists of learned and helpful professors. The non-tech placements are also quite good at DTU.

DTU has huge brand value, long-standing history, and it is the mother of a lot of great colleges.

NIT Calicut is a good choice as well because it has a good placement record and an impressive infrastructure. In terms of location, however, DTU, NSUT, and IIIT Delhi are at an advantage.

You can consider all the above factors and finally decide which of these institutions is the right choice for you to pursue your CS.

If you are looking for the best college for CS then go for DTU among the aforementioned institutes. Although all the colleges will offer great opportunities, DTU has an upper hand in certain areas.

• DTU has an amazing coding culture. Students of every branch be it CS or EP are involved in coding at some level.
• Technical societies like IEEE, ASME, CSI, and IET organize a number of coding competitions to ensure the active participation of the students. 
• DTU has a number of entrepreneurs who are on the lookout for coders. So here, you will not only learn coding but also implement it.
• Its location plays a big role in improving its brand value and opportunities. 
• DTU has a rich legacy and has given birth to a number of well-reputed colleges. It has a strong alumni network owing to its early establishment.
• Located in Delhi NCR, students are exposed to better placement opportunities in IT companies.
• DTU has an amazing placement scenario. DTU's highest package stood at INR 1.8 CPA whereas the average package stood at INR 15.16 LPA.
• DTU has the highest non-tech placement percentage (47%) among other colleges.

Ultimately a college can only give you the initial kick in your career but the rest depends on your hard work and determination!

All the aforementioned institutes, DTU, BITS, NSIT, and IIIT Delhi are excellent colleges that are well-recognized in the tech sector. As a whole the curriculum and placement opportunities for CS offered by these colleges are quite similar. The average package varies slightly but the individual differences compensate for that. Here is a comparative analysis of the placement statistics of these colleges 

However, if you look from the angle of research , IIIT Delhi certainly is way ahead than the other colleges. Its research-oriented institute is primarily established to conduct cutting-edge research in the field of CS. While BITS Pilani also has a decent research culture, DTU, and NSUT are nowhere near IIIT Delhi in terms of research. IIIT Delhi students have a lot of projects to work on under highly learned and passionate faculties. The exposure these students receive is unmatched and they are offered excellent opportunities in terms of both in industry and for higher education.

So if you want both excellent placements and research opportunities go for IIIT Delhi but if you want a good campus life too that is less focused on research go for BITS Pilani.