A Suiter is an Upright Case/ Pullman with an internal compartment or hanger with padded bars that will hold suits, dresses and other garments in place when the bag is packed to reduce wrinkling.
A Spinner has four multi-direction wheels that allow you to move the bag easily in any direction and without resistance.
Spinners may also have a suiter compartment, and the spinners will tend to weigh more due to the extra hardware.