Selective scientific research internship at Mayo Clinic or Bank of America Student Leaders Program?

Hi! I was just accepted into the Jacksonville Market for the Bank of America Student Leaders Program! I am in a bit of a situation though. I got into a prestigious science internship over the summer at Mayo Clinic too. I am not sure whether I should take the science internship at a world-class laboratory or the BofA Student Leaders Program since the acceptance rate is so low. Any advice?