You can check the model number on the back of the phone or in the settings menu to determine if you have an iPhone 6 or 6s. Additionally, the iPhone 6s introduced 3D Touch technology, which the iPhone 6 does not have.
iPhone 6s plus
It depends, se display is smaller but it's newer. It is related to your preferation that you like big phone or small, they are not realy different in performace except SE battery life is much longer. But i like Nexus or Pixel android more.
No, it is not.
Bigger - more than 6 times bigger.
It is 6 that is bigger than 0.66
4
Yes
bigger
1 - s = 6 - 6s => 5s = 5 so that s = 1
5/6 is bigger than 2/4 or 5/6 is bigger than 3/6
3