<p>I’m on the side of “just keep it to yourself”. You have plenty of time to figure things out and most students change majors at least once by the end of college. Don’t base your decision on comparing yourself to this other girl–okay so maybe she’ll win a nobel prize someday (or not) but there’s plenty of room for all types in the STEM fields. Even if your assessment of her is correct and she’s a genius, sometimes it’s just as important to be “really smart”–and it sounds like you are. Personally I was intrigued by flipturn project. If you need to explain withdrawing from “future Drs of America”, tell your parents that your application needs more diverse EC’s to be interesting. Keep your options open, don’t worry about disappointing anyone and talk with your adviser about maximizing your profile for a wide variety of schools.</p>