I tried both and I was all about going back to iPhone, until I tried Cyanogenmod, which puts (a lot of) the sense back into Android. It uses the Google launcher (without the Google Now page integrated on swipe left), but it removes the insanely annoying design decisions by Samsung, e.g. displaying a confirmation dialog when you increase the sound volume over a certain threshold even with your Phone locked in your pocket and you bombing it on your bike downhill. Or the "cannot use camera" and "sorry, dimming your screen" on 5% battery threshold. I don't know what they are smoking at Samsung, but it's not good.