If I had to choose from IIT Ropar, IIT Gandhinagar, and IIT Roorkee, I would have gone for IIT Ropar. Let’s compare the institutes and their branches individually.

IIT Ropar and IIT Gandhinagar (CS):

• The CS department of IIT Ropar is much older than the CS department of IIT Gandhinagar.
• IIT Ropar has 73 seats in CSE while IIT Gandhinagar has only 38, this is why the Closing rank of IIT Gandhinagar was better last year, while the Opening Rank of IIT Ropar is better.
• IIT Ropar was ranked 22 by NIRF while IIT Gandhinagar was ranked 23.

IIT Ropar CS and IIT Roorkee EE:

• Those who opt for IIT Roorkee EE will eventually end up in CS and in fact, they will have to invest double the efforts than IIT Rapor CS. 
• Students who take EE will have to complete an EE course along with studying CS in their free time to prepare for placements.
• EE students will have to compete with CS students in placements because Software companies will prefer CS or ECE students over EE students.

All in all, IIT Ropar CSE offers better job opportunities, and thus the general preference order looks like 

IIT Ropar CSE >> IIT Roorkee EE >~ IIT GN CSE.

I will recommend you opt for Engineering Physics only if

• You have a great interest in physics and want to conduct research or pursue higher studies in it like a Master, Ph.D., and Postdoc
• Do you want an IIT tag to target different things like UPSC, Banking, etc

A few points one needs to know regarding Engineering Physics

• No job opportunities for UG students in the core Physics Department of top Indian government research organizations.
• Companies like DRDO, ISRO, and BARC offer core jobs to MTech students only
• The usual trend is to opt for Engineering Physics and then go for Masters and Ph.D.
• Students of the Engineering physics department can opt for a minor degree from another department like CS by attaining a certain limit of credits. Nevertheless, he will be considered a physics graduate and not CS.

IIT Ropar despite being a new IIT offers decent opportunities in terms of higher studies as well as job opportunities. He can work with top research organizations like ISRO and BARC or even work at reputed firms.

Concludingly, IIT Delhi is a good choice if your primary interest is physics and higher studies. If you are looking for a high-paying CA-related job, then IIT Ropar is for you.

Rather than comparing the colleges, it’s better you identify your area of interest. Your own perspective gets to decide the college best suited for you. My friend is an IIT Ropar Electrical Engineering pass-out. She made the decision after considering the following aspects:

• Overall Development: IIT Ropar is a student-run college. The students here are the fuel driving the college. Most of the activities from the orientation of new students to the mentorship of juniors during placements are handled by the students themselves. These opportunities help them identify their own true self and capabilities. They just don’t grow academically but also as a whole.

• Interdisciplinary Learning: IIT Ropar promotes interdisciplinary learning. In fact, many EE students take up CS courses as electives and end up with CS jobs.

• Brand Name: No matter how much one devalues this aspect it is indispensable. The IIT tag you will carry throughout your life will help you get admission to higher education and also jobs. 

• Crowd: The crowd at IIT is one of excellence. Everyone is ambitious and here to achieve great heights. These peer groups become a source of constant inspiration.

• Alumni Association of IIT: This plays a significant role in developing and guiding placement drives at IIT Ropar. It offers mentorship to students and works with placement cells to ensure the best placements.

You can consider the same factors and compare the other two colleges. But I think IIT cannot be compared to just any college.