In principle, they do not differ in anything. Externally, representatives of the same human subtype, unlike animals of the same subtype, might differ, including by the color of their skin, for example. However, they have the same qualities of personality, lifestyle, abilities, and functionalities. Despite that externally representatives of one subtype of biological type “human” usually do not look similar, their internal physiological processes are analogous. For example, if we consider the possibility of normal existence in different temperature regimes, then that what is natural and desirable for a representative of one human subtype might be completely unacceptable to a representative of another, etc.
This occurs because all physiological processes are determined by the structure of psyche, and it is identical for all representatives of one human subtype. Representatives of the same subtype of Homo sapiens are born with the same subtype program, and therefore, in terms of psychical structure they are identical. The structure of psyche (subtype program) is a natural imprint, a matrix, and it does not change from individual to individual within a subtype.
Social environment, upbringing, cultural traditions, and education introduce some adjustments, but they are minor since they do not change the essential—subtype structure (“program”) of a person. Real differences between people are defined specifically by the natural subtype program, nothing else.
The study of Shan Hai Jing revealed that every person, belonging to some subtype, has stable characteristic properties of this subtype; and, regardless of race, nationality, place of birth and residence, parental guidance, and so on, as these are only minor correctors, which do not change a subtype program. Though, the same pattern is observed with animals. Living in different areas (as some animal subspecies, as well as human subspecies can be found almost all over the globe), the representatives of the same subtype may have different adaptive properties, but these properties do not in any way alter the subtype program: a horse remains a horse, a bear remains a bear, a bull does not turn into a ram, and a snake does not become a crocodile. Only here it will be a pony, somewhere else a percheron, and elsewhere—an Arabian horse. Regardless of the territory where an animal lives, it retains stable properties of its subtype. We see a similar situation with humans: the representatives of the same human subtype might have different skin color, be of different nationalities, but each retains those personal qualities, life algorithms, preferences, talents, functioning that are inherent in his subtype.
Cultural factors, national traditions, even parental upbringing (which, by the way, plays a big role for representatives of some subtypes) are only additions, layers, and do not alter the subtype program of a human. Since, in the case of biological species Homo sapiens, children are not direct continuation of their parents, as it is the case with animals. More often than not, children and parents are members of different subtypes.