None of them are new models. They are revisions. Kirby did the same thing with the Heritage II. First, they trimmed the "wings" off of the nozzle. Then, they made minor modifications o the motor housing. Then, they added the BPI light. After that, Kirby released the Heritage II Legend, which was basically the Heritage II with slight internal changes and a different handle sticker. After that, they released the Legend II, which was the same as the Heritage II Legend, except for it's red color and the redesigned G3 style tools. I consider all of these machines listed here to be part of the Heritage II line. The differences between Heritage II, Heritage II Legend and Legend II are not significant enough, in my mind, for them to all be separate models. Besides, all of those machines were still referred to as "Model H2" on their information stickers.