Yeah as a high school student, I did not have my KVPY rank, ISC percentage, JEE Mains and Advanced rank which would distinguish me from the thousands of students who applied academically ( since academics is the biggest advantage I think I have ). My point is now I have, with my ranks, backed my assertion that I am academically bright.
Why I want to transfer to US colleges is because US colleges offer more freedom in their courses and branch changes along with well rounded education. I can pursue my writing interests in US colleges, but not in IITs.
I think what would distinguish me when I apply for transfer, as compared to before, is good proofs of me actually being well enough in academics. As you might know, getting admission in IIT pretty much requires, on a general basis, no life outside of studies for two years. Now that the examinations are done, I would surely be participating in some extra curricular activities and sports in the institution. The point is, do I have to be exceedingly well in sports and other things too ( by the show of prestigious accolades ) or is it enough to be good in academics while being someone who dabbles in other activities.