Annual survey of med school adcomms–
See p. 14 https://www.aamc.org/media/18901/downloadUCLA is the largest supplier of med school applicants in the country; UCB is the fifth largest.
https://www.aamc.org/media/9636/downloadEither school provides the opportunities you’ll need to make a strong med school application–developing a strong application portfolio is entirely up to you.
Take pre-med out of the calculation and pick the school that offers you the best fit and cost.
BTW,@aunt_bea is right. CA public medical schools (except for UCR which prioritizes residents of the IE region) do not offer a strong in-state preference in admissions.
CA is one of the most difficult states for med school admissions. Only 17% of CA applicants matriculate to an in-state (public or private) medical school.
https://www.aamc.org/media/6016/download
UCLA SAIRO has a bit more detail regarding the applicants from the years 2016-2019 to med school. The last year showed that the applicants w/ UCLA baccalaureate had an acceptance rate of 52% (applicants having ≥ 1 acceptance). I did a spreadsheet that showed that a bit more than 2/3s (not quite 3/4s) of UCLA grads attend med school outside of California.