The most noticeable differences between the Nextbase 522GW and 422GW are the larger display size (from 2.5 inches touch screen to 3 inches wide), bigger image sensor, emergency SOS, and the addition of Alexa voice control, which aids in many helpful tasks. The generation gap defines a lot of improvements and an overall advantage of the new technology that Nextbase's 522GW dash cam comes equipped for improved performance