1. Much Bigger than any iPhone.
2. Although the size is big, but battery also has conspicuous improvement at the same time.
3. Thinner than before.
4.Reach up to 128 GB of space
5. Realize Apple pay using the new NFC chip
8. Less likely to shatter with ion-strengthened glass scree.
9. Up to 50X faster.
10. Learns your conversation style with predictive keyboard.
Also see How to Retrieve Deleted, Lost Files on iPhone 6 and 6 Plus