  . Australopithecus, Homo habilis and Homo erectus are different from Homo sapiens because the Homo sapiens have a larger brain mass and larger skull structure. The moder … n human today is related to the early homo sapiens but back then they where a lot shorter and more robust than we are today.istribution: Homo habilis is only found in Africa, while Homo erectus has a much wider distribution not only Africa but also spreading across areas of Europe and Asia. Morphology: Homo erectus had a proportionally larger brain than Homo habilis, and smaller teeth.