This video clip you are watching compares the old Horst Link 5 Spot rearend, in brown, to the new TNT
Technology 2006 5 Spot rear end, in silver.

Carefully watch the axle center and note the slight change in axle relationship between the old and new. The actual difference between the old and TNT style rear end is never more than 1.1 mm throughout the 5.3” of travel on the 5 Spot. Because the paths are nearly identical, pedaling characteristics remain the same.

Over the years our Horst links have been moved closer to the axle in order to reduce the noise of the derailleur hitting the frame on rough ground. As the pivot gets closer to the rear axle, it's impact on altering the axle path is reduced, therefore, that is why you can barely see any difference between the 2 images above.

The biggest visual difference between the old Horst Link and new TNT Technology, is the rear brake mount angle changes, as the suspension compresses. Through actual riding we have found this to be unperceivable in all conditions. Under ultimate traction situations there is a calculated compression of the rear suspension, although un-felt, this can have a stabilizing effect.