i have a note 4 and a moto 360. i bought the new Gear S and while it was nice i returned it 3 days later. the samsung watches are nice, display are great but they are tizen based which is samsungs OS. except for the samsung gear live which is android wear but i dont like the looks.
I retunred it becasue i use a lot of google apps like the basic ones, messenger or hangouts, gmail, maps etc. none of these are compatibale with Tizen based watches. you get rich notifacation from them bu you cannot reply to them from the watch. you have to use the stock samsung "email app" and mesages in order to reply to emails to or texts. but if you use stock samsung apps then the gear s is a beautiful watch. best screen, touch sensitivity is awesome but the app store apps for tizen are not good and not many free. watch faces i dont like. so you will not be able to downlaod any apps for google play only the tizen samsung app store. while i am sutre it will gorw in the future, I want to use my watch now.
i love my moto 360. google now is responsive. oh also i highly dislike the " S voice from samsung" doesn work as well as google. so i use mtoto 360 because i use a lot og google based apps.
hope this helps, message me with any other questiosn and i will be glad to share my experience so far.