| 1. | Homo habilis used tools made of stone, while Homo erectus did not use any tools. |
| 2. | Homo erectus had a cranial capacity of 900 cc, unlike Homo habilis who had a cranial capacity of about 650 to 800 cc. |
| 3. | Homo habilis was capable of language, whereas Homo erectus was not. |
| 4. | Homo erectus lived in larger social groups compared to Homo habilis. |