The Team Edition - The Team Edition is heavier as it is a spring loaded idler, but now you never have to worry about re adjusting the back tension nut on the original guide for gear changes or removing a wheel, just push the idler up and you have slack, let the spring loaded idler down and you have perfect tension, every time. It also helps with any tight loose spots for out of round chain rings. This is the Ultimate idler upgrade.
Alt /T - The Alt /T Idler takes the Team Edition and ads the wheel. Again, we don't recommend the wheel system, the Guide is much more efficient, but if you want to have one that is available to you, it is here. Please be careful with your chainline. It is very finicky when running a wheeled system.