I’m not seeing much difference.
“The Arizona Courts have explained that Arizona’s justification statute, A.R.S. § 13-404, which permits a person to act in self-defense in certain circumstances, doesn’t allow unlimited use of physical force. The statute only authorizes force to the extent that a reasonable person would believe is immediately necessary to protect against another’s unlawful force. State v. King (2010) 225 Ariz. 87, 235 P.3d 240. Arizona uses the objective reasonable man test: the jury must determine what the reactions of a reasonable person would have been in the defendant’s position and whether the defendant reasonably believed that he was in danger. State v. Eddington (1963) 95 Ariz. 10, 386 P.2d 20. Thus, any unreasonable or disproportionate use of force in self-defense is not allowed. State v. Tuzon (1978) 118 Ariz. 205, 575 P.2d 1231.”
“California is not a stand your ground state, but does recognize the “castle doctrine,” which applies to one’s home, place of business, or other real property. Similarly, an individual using deadly force to protect his or her property has no duty to retreat. But castle doctrine rights end when an individual is no longer on his or her real property. As a general rule of thumb, any force used against an intruder must be proportionate to the harm reasonably feared.”
https://statelaws.findlaw.com/california-law/california-self-defense-laws.html
Now go find how these cases this is supposed to apply to turned out in the real world. You will find that in both states these words are hollow. In your favor in Az. and against you in Ca. If you use a firearm to harm another in ca. other than forced entry into your home, or to defend from an armed robber at a business... you WILL be charged, convicted, and go to prison.
And of course even in Az. if you ever use a firearm to harm another, It better have been because you were in fear for your life or property. Although we can carry in Az, the punishment for “brandishing a firearm in public” is almost the same as attempted murder. You better have a very good reason to even pull it from the holster. But this is all just common sense and responsible firearm use and ownership.