IPhone 6 is only 15% faster than IPhone 5S. A8 is not much better than A7 .
Really, IPhone 6 are too underpowered.
You didn't also answered my Question.
When iPad Mini 3 Got iOS 8 it's almost PAR with iPad Air 2, while both iPad Mini 2/ iPad Air starts to struggle
Same as iPhone 2G and 3G both are clocked at 400Mhz
But still iPhone 3G manage to get iOS 4 even it is COMPLETELY SAME with iPhone 2G Specs just with major Features
You already said iPhone 6 Is 25% Faster than iPhone 5S Hahaha i've got you eh. In Logic Almost the same means "STILL FASTER"
Same as iPhone 5S will get iOS 11. While iPhone 6 will exactly get iOS 12.
Since iPhone 6 is faster JUST LIKE YOU SAID 25% it will get 1 or 2 More updates than the AGING iPhone 5S because iPhone 5S is one the WEAKEST and OLDEST APPLE DEVICE to Run 64 BIT.
I already said that in APPLE it doesn't Matter even the device has different specs The NEWER is still FASTER in the End.
Hahaha i've got you.
BTW i have iPhone SE as an iPod Touch and iPhone 7 Plus for everything. And i use them equally.