Differences between A. afarensis and H. habilis include
O H. habilis had a flexed cranial base, which A. afarensis did not have
O A. afarensis had a heavy sagittal crest, and H. habilis had a low sagittal crest
O H. habilis had large incisors, while A. afarensis had small incisors
O A. afarensis had a much larger brain than H. habilis