I don't have a definate answer, but with our new Scott Foresman math curriculum, we purchased the Pennsylvania edition. The book contains standards for all of our lessons, and it also provides test prep for the state wide tests. I would assume that the California editions are teh same--for California.
we have been looking at reading books and the new thing seems to be these inserts for your teacher manual specific to your state for standards etc. I don't think there's any difference in the actual material.