Night mode is an automatic setting which takes advantage of the new wide-angle camera that's in the iPhone 11 and 11 Pro models. It's equipped with a larger sensor that is able to let in more light, allowing for brighter photos when the light is low.
macOS Catalina Now Available
Video Shows Benefits of 2GB RAM in iPhone 6s
iDownloadBlog recorded this video showing the difference between the iPhone 6 and iPhone 6s after loading several websites in Safari:
The iPhone 6s is able to keep more websites active in memory without requiring a reload when returning to the tab. The additional RAM should also allow more apps to remain active in memory without relaunching.
The iPhone 6s and 6s Plus just launched on Friday.