I have to jailbreak my iPhone 4S. I'm confused. I have 2 choices- Either jail break iOS 8.1.2, it will give me every feature one can think of. But no speed enhancement. Rather it may slow the device a bit, which is already slower as compared to earlier versions of iOS. Or Firstly downgrade to iOS 6.1.3, the device will be faster, then jail break it to get features of ios 8 as well as every other feature. But there are hell lot of changes in both versions of iOS (Changes in iOS are described well in tables of http://en.m.wikipedia.org/wiki/History_of_iOS). I'll have to get hundreds of tweaks to eliminate the difference. Also the look and feel of stock apps will be very ugly. (iOS 8 stock apps are much more functional as well as beautiful than iOS 6). Which option should I consider?