iPhone 6 : iOS 12.1 Final vs iOS 12.0.1 Speed Test (Build 16B92 / 16B93).
Apple released iOS 12.1 shortly after their event as expected, it comes with group Facetime, new emojis and much much more.
The last Beta of iOS 12.1 did show a slight decrease in performance, but hopefully that has been solved in the final release.
I will again do the side by side speed test, but as this is a final release, I will also shoot a specific iOS 12.1 Battery test video.
This takes about 2 days to shoot and edit, so expect it online no later than Friday.