UCD v.s UCSD

Hello, everyone!
I got admitted to both school as a junior transfer (transferring out of CCC in Fall 2017) and got my first choice major, Microbiology. Personally, I prefer UCD since I feel like I would fit into the small college town vibe better. However, I am aware that UCSD would help me more in going down the pre-med track (according to my mom, her coworkers,etc.) hence why I’m a bit conflicted. I do plan on visiting both campuses later in May, but I was wondering about your guy’s experience with the two campuses?

What are/were the pros and cons for you at both campuses? In addition, would there be a large gap in resources between the two campus for pre-med?