It's hard enough to craft desire for a single identity. When asked to think of an Apple Watch, people don't know what to picture. Can you imagine if the original iPhone in 2007 came with sixty customizable skins?
Well, um, it did come with hundreds of customizable skins. They were called iPhone cases. They were, and still are, endemic.
Instead of a single, perfect product, we got a jumble of features and choices.
Actually, there is no functional difference between the various Apple Watch lines. It is a single product. It simply allows the user to customize the appearance of the product. This is necessitated by the fact that this device, unlike all Apple devices to date, is worn on your body.