Just new phone colors? Is that all?
You forgot about the new water resistance rating, a new display that DisplayMate rates the highest, a new dual camera system, a new processor that's 40% faster than the previous model (and 2x the iPhone 6), a new operating system, longer battery life, etc. Yes, just new phone colors.
And those watch bands! The standard go-to hackneyed tech forum meme that anyone still in junior high school can quickly trot out. Just add a nah nah ni nah, nah for bonus points and forum approval. Not picking on you, but that's standard fare, here.
Probably forgot the new improved model that's water resistance rated, with GPS, faster, brighter display, and much better OS with expanded fitness profiles.