Regarding the use of force for self defense or for the defense of others, the laws of most US jurisdictions are largely very common.alas, since the laws of deadly force within these 50 states are a quagmire of judicial mishmash which even the legal beagles and courts consistently interpret erroneously...so whose deadly force statutory mandates or conflict resolution guidance are you pontificating citizens utilize?
There are differences in terms of a duty to retreat, which by definition would encompass differences that have to do with castle doctrine. Know those, and you are good to go anywhere.