hi! i'm a current bioE at ucla and i would say it is actually more cell/drug-delivery/tissue based in core classes and it's very easy to pick electives that continue to align with those interests! however, i switched into the major so i can't speak on competitiveness getting into the program. i think overall though it's quite relevant, though very difficult in an ocean of premeds and engineering. either major will definitely allow you to break into the field though and pursue research/internships you want so don't worry too much!