First, it helps if you start thinking in terms of careers rather than educational programmes. A career in technology versus a career in business and management is a better way to put it. Not M Tech versus MBA. Educational programmes are only paths to get to a career. If you are not interested in a career in technology, be sure that business and management is what you want. Learn about and understand both the work profiles and figure out which one suits you better. Once you do this and find that you want the management track, you can start preparing for the MBA. You would not have wasted a year if you take up a job after completing the BTech. The MBA is a programme which you gain the most from when you have some work experience behind you. Even a technical role for a year or two will better prepare you for an MBA than going for it straight away.