Current undergrad here majoring in bio. I am really interested in undergraduate research, and I was just offered two positions in pretty different labs. Both have great reputations are well funded. One is working in Cell & molecular bio and the other is in molecular medicine. The lab in the former is pretty large (good number of post-docs, grad students, undergrads) with a well-known PI, and I really wasn't given the chance to talk to the PI about what kind of work I would be doing (although I was told i'd be assigned to a grad student). The other lab is much smaller (there would only be three of us), and I'd probably have a much greater involvement in the work. The PI seems really nice and passionate about having me engage directly in his work. One thing I should point out though is that the hours per week demanded in the molecular medicine lab would probable be a lot more, but the opportunities for publications seem greater in this lab. Any advice on which lab I should pick? Thanks in advance for the input!