I recently upgraded my Iphone 4S to the Samsung Galaxy Note 4. For what it's worth, I think this phablet is awesome. It has considerably more RAM than even the Iphone 6+, has a larger and better screen and resolution, is cross platform integrated i.e. with gmail, google + ect...and then, it has the S pen, which is pretty awesome as well.
I like the fact that it has a charger pad, a wireless keyboard and can be used like a laptop when out of town.
I'm less happy about the service plan choices. If this were offered on Walmart's unlimited plan, it would be unbeatable.
All in all, this phone blows the Iphones out of the water in performance.