I have the S3 Classic. When I had the AW... I primarily used it for notifications and taking/making a call or answer a text quick.
I just dont see a smartwatch as a viable app platform. The experience is....... underwhelming. IMO.
For me... the S3 is perfect, its fast, easy to use (the rotating bezel is a masterpiece). I would ofter get confused when using the AW. Which button do I push, which one do I hold down? for what? etc etc.
And finally...... ITS ROUND... like a watch should be.
The watch faces look astonishingly real, add the always on display, many people didnt know I was wearing a smartwatch.
In my circumstances... the S3 is a winner.
So far so good using it on my 7Plus.