For me it's a few things. First, the knuckles are aluminum rather than steel or cast iron as the other kits, less weight for the suspension to control. The knuckles also move the wheel hub 8mm forward, and the tie rods are moved up and low profile ends are supplied to avoid any bump steer. Lastly the skid plate becomes a part of the structure moving the differential off the motor mounts while increasing clearance and making the skid plate part of the support system stiffening the entire structure.