Well, CA Compliant simply means the handgun is listed on the CA roster of Safe handguns.
The actual "safety" devices the specific model has depends on when it was added to the roster and if the manufacturer has maintained it. Once on the list, they are grandfathered. If they go off list, they then need to comply with current standards to get back on.
I bought a Sig SP2022 in Dec 2012 that was made in Apr 2012. It does not have an LCI, or mag disconnect. Neither does my 2013 Rock Island 1911. My Beretta M9 (also 2013) uses the external extractor as the LCI but has no mag disconnect.
Sig has allowed to let quite a few models go off list.
New gun models not only have to have the above listed "safeties" but microstamping as well. A bill is floating around to require "owner authorized" as well.
IMO, it *is* meant to be a deterrent. While the cost of testing seems cheap, the cost of design, development, QA and production for a "one state gun", can be restrictive.