The Tornado is a 20' cat with a 10' beam. It is used primarliy for racing and must be dissasembled to trailer as it is too wide for public roads. The Hobie 21's have the SE (also a 10' beam but the beams pull apart to widen and slide in to trailer) and the Sport Cat, which has a built in cubby and is more for cruising. Both Hobies have wings, the Tornado does not. The Hobie 21's are best for people who don't trailer as it is such a pain to set them up. What kind of sailing are you looking to do?