According to our information, the two models differ mainly in terms of maximum speed and motor power. The Spacewalk Lite reaches a maximum speed of 6 km/h and has a 2.25 hp motor. The Spacewalk E4, on the other hand, offers a maximum speed of 4 mph (approx. 6.4 km/h) and is also equipped with a 2.25 hp motor. Both models are designed for a maximum user weight of 120 kg. In addition, the Spacewalk E4 has a 5-layer anti-slip running surface and 8 silicone shock absorbers for extra comfort.