it will have a battery and a screen and a home button.
1. A 10 megapixel shooter would be needed to stay competitive in numbers race.
2. 2 GB RAM is a given with Apple A9 chipset. (First iDevice to go quad-core)
3. Both 6S and 6S+ models will have 1080p anti-reflective screens.
4. Tweaked iPhone 6 design.
Even if iPhone 6S has A8X specs, I would be more than happy.