Very simple:
1. thickness - meh
2. water resistance - iPhone has enough for acidental drops. I'm not planing to use the iPhone in the water so, do not care about IP 68
3. camera - there is more to the camera than megapixels. This comparison leaves out important aspects of the camera from the most obvious thing (dual cameras) to those tiny details (deep trench isolation).
4. display - the Galaxy S6 uses a pentile matrix in its subpixel scheme. That effectively means that there are 2.5 lighting elements per pixel. The iPhone seems to use a standard RGB subpixel scheme with 3 elements for each pixel, which makes it the winner in clarity. Then again, pixel density is not the only thing that makes a good display. Reflectability levels, viewing angles, and color accuracy are much more salient aspects of displays since the onset of retina displays.
5. 64 GB storage - the iPhone has significantly faster storage
6. super amoled screen - a marketing gimmick that means next to nothing for measuring screen quality. See 4.
7. 6 core CPU - once again, there is much more to a CPU than the number of cores. Number of transistors, caches, frequency, size, architecture. Since the A7, the CPU on the iPhone far outpaces their competition that year. Since the A9 we've entered territory in which the latest and greatest from Snapdragon couldn't compete with the year-old iPhone CPU
8. RAM - Apple's compression algorithm far surpasses the messy garbage collection in Android. iPhone can handle much more apps in the background than Android counterparts with double the RAM
9. Wifi - that's the current standard in every phone. What's the point?
10. NFC - peer-to-peer wireless is superior speed wise, security wise, and range wise
11. wireless charging - This is not really wireless charing. It is plugless charging. You need to buy a 3rd party accessory to get a less efficient, more time consuming, more heat generating (and thus battery damaging) charging solution, that still requires a cable and that can't be used while using the phone in any kind of ergonomic position.
12. no headphone jack - I have AirPods and Beats Solo 3
In addition:
this is a pick and choose type of list. Call me when the latest and greatest from Samsung includes:
1. 3D touch
2. True Tone Display
3. Fast, Secure, and Convenient Facial Recognition
4. Software Updates
5. Dual Speakers
6. A chipset better than the A11
See? I can make the S8 and Note 8 feel outdated as well