PWM at BB during school year or try boutique IB?

Hey guys :) I am an incoming sophomore. So this summer I am interning at a top BB (MS,JPM,GS) in the PWM department. I go to school in the city, so my boss said if I wanted to I can continue to work during the school year one day a week. My goal is investment banking, so I was wondering if it would be better to try to intern at a small investment bank during the year or just keep my current job. Wouldn’t it look better if I interned at an investment bank during the fall? With recruiting and everything starting early 2020 for SA 2021.