I currently have an Android device and I'm looking to get an iPhone -- most likely either the iPhone SE or the iPhone 6s. The iPhone SE is appealing to me for its smaller display size and it's longer battery life. However, my hesitation with going for the SE is that I currently have a 4-inch iPod Touch 6th generation, so it seems like it could be redundant to have two 4-inch displays. At the same time, I also know that the 6s supports 3D Touch, which I could see becoming valuable in the near future. My questions are, how significant is 3D Touch expected to become, how much of a shorter battery life does the 6s have in comparison to the SE in any user's experience, and is the larger 6s display bothersome to anyone who was used to a 4-inch screen? Thank you!