The Signature Series has an offset pole that minimizes any shaking. It has a compression crank which is located inside the pole. There is only tension on the hoop when the crank is in use. The Signature Series has a raise and lower range of 6-10 feet allowing kids of all ages to play. Limited lifetime warrenty.
The Extreme Series has a straight pole giving it a clean look. The tension crank is on the outside of the pole giving you easy access when adjusting the hoop. The raising and lowering range is 7-10 feet. The Extreme Series is the cheaper of the two systems, but is still made with the same high-quality materials and has a limited lifetime guarantee.