Ok. Going with that notion.
Many body parts of humans are compatible with each other. Genetically, most humans are compatible in theory although not all produce babies so maybe not.
Blood types have weird combos
Internal organs? Well that’s when things get more specific.
So, there’s extremely broad compatibility among all human beings. Mating compatibility is just about a guarantee in theory.
Mating compatibility with other great apes is a NO.
So, human = human. All variations of the same car.