>>10832509they had different bodies and skulls.
they were manlets with curved shins and more robust bodies compared to modern africans.
their skulls differed due to brain differences including a larger occipital lobe/cerebellum manifesting as a bump or bun on the back of their skull called an occipital bun (this is a rarity but does exist in modern humans)
the most interesting difference is that they also had a smaller cavity for verbalizing and making sound similar to that of every primate before modern homo sapiens