It depends on your preferences. ASDOH puts a huge accent on community service and public health work. Do you enjoy going out into the community / wish to surround yourself with dental students who put service as a priority in their careers? ASDOH's 4th year rotations are great and there are 68 sites all over the nation that you can choose from, whereas Western's externship sites are limited to California only. At the interview, ASDOH told us that 35/36 of their students last year got into their first choice for specialty (that 36th student probably still got accepted, but not necessarily their first choice per se) and that many graduated having done at least 15 root canals on average.
Both facilities at Western and ASDOH are fine, the cities their located in are both decent/not super rural but not super urban. I guess it depends. My personal feel was ASDOH >> Western because the people seemed more genuine and relaxed. Also, ASDOH has a block curriculum which is pretty awesome compared to your traditional boring 'ol basic science curriculum. ASDOH's clinical education also seemed a lot better than Western's (the students sounded tons more confident).
They're both great schools though, congratulations! I interviewed at both and am also a California resident. Haven't heard back from ASDOH, but accepted at Western and if I were in your position, I would choose ASDOH in a heartbeat but as I started with, it depends on your preferences 🙂