Having known some people studying in both these institutions, I can say that if you plan to get a job offer, go for CS at Thapar University. If not and are interested in doing research opt for Engineering Physics at DTU.

• Engineering Physics is a field which does not anymore provide a promising opportunity to its aspirants. 
• If you go with this choice of branch you might get research opportunities after higher studies. 
• Moreover, if you have prioritized DTU, keep in mind that the quality of education and academic career is reducing with every passing year. 
• Few of the many branches at DTU are striving to keep their esteemed position with engineering physics not being one of them.
• Instead, CS at Thapar University would be an excellent option for building a path for your career. 
• This branch is known for its exceptional academics and for the opportunities held out to the students. 
• Although it is a batch of almost 570 students in CS you can certainly end up with a 5LPA and above package by the end of your 4th year.

There are many reputed companies that take part in their placement program and recruit CS graduates. These include Infosys, Wipro, Accenture, Capgemini, Oracle, IBM, ZS Associates, Morgan Stanley and many more.