I've been to both of the above, but that's because I was a tourist and these are the touristy places. While they were fantastic, I assume locals have their own favorites other than these two.

For a non-traditional suggestion, if you live in San Francisco, try Sneaky's BBQ. It's delivery only, and comes cold unless you're having an event catered, so you will have to warm it in the microwave. But the meat is absolutely delicious. (I do not care for their sides, however.)