Chance threads at a school like USC are a waste of time - it is too holistic for anyone here (including those of us that have had multiple kids admitted) to give you anything other than a guess. Unless someone is something like an Intel Science Fair winner, most ECs seem the same for a solid or high achieving student, just different acronyms. Meaning, they don’t mean much to people outside of admissions - they are the ones that can separate substance from fluff and see if together, with other aspects of the application, they form a solid and well rounded student that fits what they want and need at their school, at that time. Many many variables.
This is still the best info on the subject:
https://tfm.usc.edu/a-guide-to-uscs-college-admissions-process/
Good Luck!