The Frame design for the SX trail and the Enduro are almost identical. The enduro has a steeper head tube angle and a little less travel. Perhaps a little longer top tube also. The bikes are made for doing similar things, the SX for more heavy duty stuff the enduro for longer treks. It's a good design simpley, however you have an s-works which is even more babied. The s-works bikes are made out of stronger lighter material and handcrafted yatta yatta yatta,