Maybe that is because iPhone 6 plus and Samsung galaxy note 4 are both released in beginning of September, and note 4 is earlier nearly for a week than iPhone 6 plus. So people are perfering to do the comparison. Now here we just from 6 cases offer the two phones data for comparison: design, display, camera,hardware, battery and availability.
Samsung galaxy note
Posted: 03 Sep 2014
Market Status: Released US carrier availability: Available - AT&T, Sprint, T-Mobile
iPhone 6 plus
Posted: 09 Sep 2014
Market Status: Released US carrier availability: Available - Verizon, AT&T, Sprint, T-Mobile, U.S. Cellular, Boost Mobile
In addition, Samsung galaxy note 4 have e-pen, and iPhone 6 plus don't have this kind of device, in fact, all of iPhones don't have. They are both excellent. If except their price, you can depend on your own need to choose the better one.
If you like using smart phone for working, and like the e-pen, the note 4 is a nice choice. And if you are always use the ios, and like to play some mini games, I think the iPhone 6 plus suit you better.
All these informations are from Hytparts store, if you want to share, Pls mark where it is from,thanks.