Good ad, stirs controversy.
Otherwise, there is a reality check :
Samsung Note 4 is hands on better than the iPhone 6 plus for the hardware. Exception being the finger sensor. And it has a bigger screen while being not as large.
Design-wise, iPhone 6 plus rules of course. Not a surprise, given the premium price !
So if you're mostly into design and appereance and hype, you'll go with iPhone. If you're more into hardware specs, and prefer a screen that has more pixels and contrast, you'll go with the Samsung.
And for the phone, I don't see any noticeable difference between iOS and Android. The latter gives you better flexibility.
I have an iPhone 5, I will switch to Samsung in October. That's called not being a sheep. But I will keep my iMac over any PC forever.