When comparing the Roborock E5 and the Roborock S5 Max, there are several key differences to consider. The E5 is primarily a vacuum cleaner robot, while the S5 Max offers both vacuuming and mopping capabilities. The S5 Max has a larger water tank capacity, allowing for longer mopping sessions without needing to refill. In terms of navigation, both models feature advanced mapping technology, but the S5 Max offers multi-level mapping, which allows for customized cleaning settings for different areas of your home. The S5 Max also has a higher suction power compared to the E5, making it more effective at picking up dirt and debris. Additionally, the S5 Max supports selective room cleaning, where you can choose specific rooms or areas to clean. On the other hand, the E5 has a longer battery life compared to the S5 Max. Ultimately, the choice between the two models depends on your specific cleaning needs and preferences.