My new windshield mount arrived today. The physical difference is nill that I can see but the difference in operation is. It takes a great deal of force to move the ring to the locked position. It appears to offer a great deal more resistance and the tomtom does seem firmly in position. I have noticed that my ipod seems to have static and that the dc power light is off as much as it is on. I have not had time to examine the connections but I am hoping just a little dust or oil on the new mount.