The Dyson Ball and Dyson Small Ball have a few key differences. The Dyson Ball is larger and heavier, making it better suited for cleaning large spaces. The Dyson Small Ball is smaller and lighter, making it better suited for cleaning smaller spaces. The Dyson Ball also has a higher suction power, making it better for picking up more dirt and debris. The Dyson Small Ball has a lower suction power, making it better for cleaning delicate surfaces.