Got a HUGE question about the state of CA and cars and reg.

What is the major difference between "California" cars and the ones out here on the east coast?
The reason im asking i went to the parts store today. and pretty much everyhting i was inquiring about they ask "is it a california car"? one of them being my starter and the other my Brake Master Cylinder..
is there a difference in starters for a 1993 Civic Si in Mass and one in Cali?
I really dont think so. besides some equipped with the Mitsuba units and others with NipponDenso
I know about the smog thing out thre how it's much stricter. But seriously a starter?
It might sound like a stupid question but i was just wondering.
The reason im asking i went to the parts store today. and pretty much everyhting i was inquiring about they ask "is it a california car"? one of them being my starter and the other my Brake Master Cylinder..
is there a difference in starters for a 1993 Civic Si in Mass and one in Cali?
I really dont think so. besides some equipped with the Mitsuba units and others with NipponDenso
I know about the smog thing out thre how it's much stricter. But seriously a starter?
It might sound like a stupid question but i was just wondering.