Amazon (AMZN) and Tesla (TSLA) are different companies in the robot race, focusing on developing a larger, more integrated system. While Amazon is focusing on different uses, it is building a larger system that includes last-mile delivery, home interaction, warehouse automation. Meanwhile, Tesla's Optimus is a vertically integrated robot designed to perform tasks such as factory work or household chores. The two companies aim to solve the hardest problem once, then replicate it everywhere. The winner may be the company that builds the most useful network around it.