With most of Apple’s products, choosing which model to buy involves evaluating specifications: Do you want a MacBook Pro with a 13-inch or 15-inch screen? How much storage and memory will it have? How fast is the processor?
With the original Apple Watch, the main differentiators were the materials used for the case and the display cover. That’s still true to some extent, but the Series 1 and Series 2 models introduced in September 2016 are faster than the originals. Features also vary between Series 1 and the four Series 2 models: the Apple Watch, the Apple Watch Nike+, the Apple Watch Hermès, and the Apple Watch Edition ①. In addition, you get to choose the size and band.