I have the Nike S2. I love it. I specifically waited for it to come out instead of getting standard S2 just for the band.
In my mind, there's no advantage to getting a Nike over a standard AW unless you really want the watch faces. Just get whichever one is on sale and/or whichever band you like the best.
Personally, I've stopped using the Nike watch faces because it's not particularly well suited for displaying my calendar. However, I do like the way the Nike Digital face displays the Activity data with numbers rather than the small rings (as long as you put that complication in the bottom slot).
Incidentally, Nike has screwed up the NRC app so badly that I no longer use it. I just use a 3rd party running app. The watch itself is fantastic, but the app side of Nike is horrendous.
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Maybe I'm dense, but what is this "nike integration" mean to you? I'm unsure as to what some folks are thinking a Nike watch can do that a standard AW can't, aside from the watch faces, included band, and siri-start.
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That particular picture shows an LTE version of the NikeAW3. Perhaps that color combo is exclusive to the LTE model? I'm on a S2 Nike and I can't seem to select that color combo either.