If you're looking for a top engineering college in India, the National Institute of Technology (NIT) Trichy is a great option to consider, better than IIT Dhanbad. Here are some reasons why:

• CS and other branches: NIT Trichy is known for its strong programs in computer science (CS) and other engineering branches. This means you can expect a high quality of education in these fields.
• Excellent placements: NIT Trichy has a great track record when it comes to placements. This means that many students who graduate from NIT Trichy can secure well-paying jobs in top companies.
• World-class infrastructure: NIT Trichy has invested in top-notch infrastructure to support student learning. This includes modern classrooms, well-equipped labs, and other facilities.
• Experienced teachers: The faculty at NIT Trichy are highly experienced and knowledgeable. They are committed to providing students with a high-quality education and helping them succeed.
• The best environment for teaching and learning: NIT Trichy offers a supportive and collaborative learning environment, which can be beneficial for student success. Additionally, the college offers a range of extracurricular activities and student clubs to help students develop new skills and interests.

It's worth noting that while a college's reputation can be important, it's not the only factor to consider when choosing a college. It's important to also consider your own needs and preferences, such as location, campus culture, and program offerings. However, if you're looking for a strong engineering program with a good track record of placements and top-notch facilities, NIT Trichy is a college to consider.

I don’t think anyone choosing IIT Delhi over any other engineering college has made a wrong decision given the opportunities and life experiences that come with it. While both are crucial, your choice of Institute is more important than your branch. 

Here is a friend's journey for your reference l was a BTech student (Civil) at IIT BHU with a rank of 3600. 

• First, he completed a Nanodegree program from Udacity in Self Driving Cars and Machine learning
• Next, he worked as a Derivative Trader in Future First where he performed Machine Learning and Deep Learning algorithms.
• After gaining great experience and exposure he joined Quantela Inc for 2 Years where he worked as a Data Scientist.
• Today, after a lot of job switches and immense experience he is working at Derq in Dubai as a Machine Learning Scientist and doing Online MS from Georgia Tech University in Computer Science.

This journey of a 7-pointer Civil Branch student to a high-tech CS company proves that branch does not matter in the end. He made the most of his campus life and kept struggling to switch his branch and eventually succeeded. That being said, you have made the right decision as only IIT Delhi can give you the right set of opportunities and exposure and not DTU.

I completed my B.Tech CS from NIT Rourkela, so I can only speak for my own college.

For placements, NIT Rourkela is probably behind the other two because of its locational disadvantage. The lack of good connectivity creates difficulty for IT/software firms to reach Rourkela during placement season. Despite that, last year, the average package for B.Tech CS was Rs. INR 21.87 LPA at NIT Rourkela. This is quite a decent figure.

Moreover, I can assure you of the excellent research and infrastructural facilities at NIT Rourkela. It is probably better than the other two in this regard, and can even be compared to NIT Trichy. A good number of students from the CS department get offered foreign research internships. Some of them even end up receiving an offer for higher studies from universities in the US and Europe. 

NIT Rourkela is a good option for B.Tech CS if you want to pursue higher studies, but it might not be the best in terms of placements.

BITS Hyderabad is definitely better than VIT Vellore for CS. Here are some reasons for the same-

• Coding Culture- Even VIT Vellore has a decent coding culture. But when it comes to any of the BITS campuses, the coding culture over there is far more superior. The environment at BITS is such that one feels extremely motivated to learn and build new stuff. The BITS faculties are highly qualified and supportive.

• Crowd- Getting into BITS is difficult, and there are no NRI or Management quota seats. Each one of the students gets in through pure merit. Because of these reasons the BITS Hyderabad crowd is overall better than the VIT Vellore crowd.

• Placements- The Computer Science department of BITS Hyderabad witnesses better placements than VIT Vellore. But even VIT Vellore is good for CS placements.

• Course Intake- VIT Vellore intakes a lot more students on a yearly basis. Though the competition is much higher at BITS Hyderabad, the end results are more fulfilling for each one of its students. 

Thus, I would recommend you choose BITS Hyderabad for your B.E. in 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!