ME Vs ME + BME

Hi, I’m a sophomore in high school in a program dedicated to aerospace engineering, but I wanna go into biomedical engineering/ mechanical engineering. Would I have a better chance of college admission if I apply as biomedical engineering then, after admission becoming a double major(mechanical engineering and biomedical engineering) or just mechanical engineering and then double major as bme and me?

During senior year, I get to do a research practicum and I was going to do a project regarding biomedical engineering.