what is the difference between apple watch and series 1?
But here's the big difference: Series 2 (right) is swim0-proof to 50 meters, and has built-in GPS, Series 1 (left) doesn't. Both watches feel the same; Series 2 has a brighter display, though. ... Both are faster than the original Apple Watch, too. Series 1 has a new processor that's a bit faster, much like Series 2.