Whether doing MS by Research in ECE at IIIT Hyderabad is worth it or not depends on what you are expecting from it. Consider the following situation

• If your goal is to secure a good package, though MS, M.tech will serve you well.
• If you are a research enthusiast and want to pursue the same, the primary step is to identify the research area and choose the institute that specializes in that area.
• If you are planning to do a Ph.D., then go for an institute that will support your research area in MS and Ph.D. It’s better than changing colleges.
• If you want to gain some work experience before going for your Ph.D., then M.Tech is a better option because you can start working right after 2 years and won’t have to wait for 4 years as in the case of MS.

Overall, IIIT Hyderabad certainly has a great research culture so it’s a good option if there are good professors in the area of research you are willing to do.