Is there any MAJOR features between the iPhone 6 and iPhone 6s?

Is there any MAJOR features between the iPhone 6 and iPhone 6s? - 1

3D Touch
Touch ID 2nd generation (a lot quicker and reliable)
12 MP back camera that can shoot 4K video
5 MP front facing camera
Aluminum 7000 series (stronger than the 6 so it can't bend)
A faster Apple A9 processor that has the M9 co motion processor incorporated in it, this permits always on Siri, faster loading times, better graphics, less battery use, more fps when recording, etc

They share the same exterior design but 'under the hood' they're different. If you want to know all the features it has over the 6, search on YouTube for the 6s keynote.

3D Touch
12MP camera
Faster Touch ID
Better internals