My realistic predictions for the iPhone 6S based on numerous sources:
- Next-gen Super AMOLED display @ 1080p (similar to the Galaxy S6 but with a lower resolution. Super AMOLED displays are now more color accurate than IPS displays). Another likely option is that the iPhone 6S will use an IPS panel @ 1080p.
- 14nm/16nm CPU
- LPDDR3 RAM manufactured by SK Hynix/Micron (probably not LPDDR4)
- 16MP camera with OIS and DSLR functionality (mainly tracking AF/phase detection which are features also in the Galaxy S6) manufactured by LG Innotek and Sony (Apple could go with 8MP again, but I think 16MP is more likely as people may complain about low quality of zoomed-in photos of the iPhone 6).
- Standard non-UFS flash memory manufactured by SK Hynix/Toshiba/Sandisk
- Fast charging battery technology
- Sapphire glass (?)
- Next-gen force touch integration (?)
And to those who are saying that better specs =! better real life performance, you're only partially correct.
One big difference I've noticed between the Galaxy S6 and the iPhone 6 is that the Galaxy S6 loads apps 3~5 seconds faster. The iPhone 6, in comparison, is slow but not "laggy" as some would define it. I'm being 100% honest here.
Both phones don't have much stutter (i.e. the transitions are smooth). iOS just hides lag well, in that there are no jittery movements and stuttering.
The Galaxy S6's processor is definitely much more powerful, allowing apps to load faster. And it's definitely noticeable to most people as some of my friends are saying how fast their Galaxy S6's are compared to their previous phones (most of my friends with the Galaxy S6 have previously owned the iPhone 6/5S/5 or Galaxy S5/S4).
Hence why the iPhone 6S NEEDS to go to 14nm/16nm in order to compete with the Galaxy S6. It's ridiculous to think that a hardware upgrade isn't needed. As technology advances, competitors will have to use that advanced technology in order to remain competitive.