Computer science engineering (CSE) is all about coding and programming. ECE has a blend of physics, electrical components, electronics and programming. In Electronics and Communication Engineering (ECE), only a little programming is involved. The deciding factor should primarily be your inclination towards either of physics or programming. In addition, as an ECE graduate, you can take up a job in both software industry as well as the telecom industry, unlike the CSE graduates who can land up a job only in the former.