Go to Davis.
UCD tends to have lower metrics for acceptance relative to other schools. UCD is also very mission-driven: serving the underserved and increasing healthcare access in the greater Northern California region.
At Davis, I would focus on getting your GPA and MCAT up to par. Do all the clinical and non-clinical volunteering you can, so you have your best shot at acceptance to UCDSOM later on, since you would have you foot in the door already. During my time at UCD, most of the pre-health advisers (not all) actually knew what they were talking about (i.e. worked for UCDSOM admissions in the past or worked for another admissions office) and were friendly and helpful.
Davis has a really good quality of life as well. Friendly, relaxed, and safe atmosphere. Apart from the students, mostly young couples starting their families or retired folks.