As Apple did with the previous iPhone 6 and iPhone 6 Plus, the iPhone 6S Plus is a much larger device. The size of the display and body is pretty much the most significant difference between the iPhone 6S and iPhone 6S Plus. The iPhone 6S Plus sports a large 5.5-inch (diagonally) display with a pixel resolution of 1920 x 1080 Full High Definition, which equates to 401 pixels per inch (ppi) on the display, in comparison to the 4.7-inch (diagonally) High Definition display of the smaller iPhone 6S.
This means that the iPhone 6S Plus has a got a much better display in terms of clarity and sharpness – and besides, it is always better to watch a video or play a game on a larger display than to watch it on a smaller screen.
Optical Image Stabilization (OIS) for a Better iPhone Camera
The iPhone 6S Plus utilizes all of the same specifications as that of the iPhone 6S. The same processor, the same amount of RAM – most of the hardware components inside are similar. The camera module itself is quite similar as well actually; both iPhone 6S' utilizes Apple's iSight 12 megapixels camera with an aperture of f/2.2 and True Tone flash.
The iPhone 6S Plus, however, has a little added bonus added to its camera, and that is optical image stabilization (OIS). Optical image stabilization takes the form of a moving camera inside the body of the smartphone, thereby reducing camera shake during video recording. It also helps to assist the user in providing a blur-free photography experience. If you think that optical image stabilization does not seem to be such a useful feature, then you probably have not tried it out. Give it a try and then you'll understand.
With a Greater iPhone comes Greater Battery Life
With a larger overall body and display definitely comes with a larger space in the iPhone's body. Any manufacturer would be a fool not to utilize that extra space for extra components or features. Apple has already included a better screen and optical image stabilization in the camera, and they are smart enough to include a much larger battery in the iPhone 6S Plus. Where the iPhone 6S has a battery capacity of 1715 mAh, the iPhone 6S Plus has a massive 2750 mAh, offering a much longer battery life. You can now stay away from chargers and power banks for much longer periods without having to worry about having an empty tank.