I will recommend you opt for Engineering Physics only if
A few points one needs to know regarding Engineering Physics
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.