Final answer:
Comparisons of tooth wear suggest that early modern humans had smaller jaws and teeth with specific skull characteristics, while Neanderthals had larger front teeth and more technologically advanced tools. Early modern humans likely replaced Neanderthals through competition for resources and better survival strategies.
Step-by-step explanation:
Comparisons of tooth wear in Neandertals and early modern humans suggest that early modern humans had smaller jaws and teeth, with the third molar larger than other molars. Neanderthals had a sagittal keel on top of the skull, large brow ridges, and a large nasal cavity. Early modern humans also had humanlike feet with arches and ankles. Additionally, studies indicate that early modern humans replaced Neanderthals in Europe through competition for resources and better survival strategies.