The Rider model by Tomtom is truly a great sat nav for motorbikes, but it is virtually tied with the Garmin XT in the Zumo line. Any sat nav review, granted it is a motorbike sat nav review, will almost always compare these two models. The differences between the two models would truly come down to user tastes since both have a level of innovation that is useful for motorcycle riders. The Garmin Zumo XT wins this argument in my opinion thanks to the numerous features found within adventurous routing, which is perfect for adventurous riders.