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
iPhone 4 vs iPod Touch 4 Comparison Videos
Letemsvetemapplem.eu has posted a series of videos providing some direct comparisons between the iPhone 4 and 4th generation iPod Touch. The first one is a speed boot test between the iPad, iPhone 4, iPod Touch and iPhone 3GS. We're not sure if it shows very much, though the iPad booted the fastest of the bunch.
More interesting is the embedded (above) video showing the differences in the display angles between the iPhone 4 and the 4th generation iPod Touch. While the new iPod Touch does contain a retina display, it is not the same high quality display found in the iPhone 4. The iPhone 4 uses an IPS display which offers better viewing angles.
The site also provides a side-by-side comparison of the iPhone 4 and iPod touch taking video: