For placements, M.Tech is better than MS. This is because of the huge number of SDE jobs in India. To get good job offers, MS students must devote extra time to practice coding and problem solving.
In terms of exposure, MS is a better course. MS students at IIIT Hyderabad work with cutting-edge technologies and are in touch with the latest developments in their field. For this kind of exposure, M.Tech students need to devote extra time in doing relevant projects.
For Ph.D. aspirants, the research value at a global scale is more for the MS course. In this respect, M.Tech students can either convert to MS after a year or publish relevant research papers for paving their path into the area of research.The faculty is the same for both the courses at IIIT Hyderabad.
Thus, based on your preferences you can either choose M.Tech CSE or MS in CSE in IIIT Hyderabad. It is a renowned institution and will open numerous doors for you after your degree.