I think what Samsung need to do is brainwash people into thinking they make the greatest phones so that people will buy them.
I have a Moto X 2014, Note 4, Blackberry Passport, Nokia 925, 1020, 1520 and an iPhone 6 and they all have their own parts that one is better than the others. I wouldn't ever think that iPhone is the best phone overall mainly because of how Apple goes about things like Bluetooth and so on plus they are playing catchup on thinks like nfc and notification light or even better glance screen like windows and Moto X but they do make a great phone. It is not without faults though and anyone who says it is is either fooling themselves or bulls****ing. I had an S6 edge for just over two weeks and I didn't like it and I think the edge bit could have been implemented much better(as it was on the note edge)
The iPhone is a simple phone for people that don't want to tinker with what they have. I couldn't do with just an iPhone because I like to change think about but for now I'm enjoying it.
I see people being very quick to say Samsung copied the iPhone with the S6 but i wonder if they are as quick to admit that Apple copied the HTC M7?