I'm not sure why you're suddenly restricting your "two cars per family" point to the city downtown cores alone. But sure - if we change frames then both city d

I'm not sure why you're suddenly restricting your "two cars per family" point to the city downtown cores alone. But sure - if we change frames then both city downtown cores are either easily walkable or extremely accessible via public transportation, hence ceteris paribus neither family (living in the downtown core) in their respective cities would require more cars than the other.