This shows one is samsung and another one is TSMC and this one shows: This video will show the iPhone 6s Plus Rose Gold A9(Samsung) and the iPhone 6s Plus Gold A9(TSMC) go through a battery test to see if there is a difference. This is a time lapse video and the units were charged to 100% before test. Tests run were Geekbench, FIFA 16 (Gameplay), YouTube Videos (3 Played), Delete and Download FIFA 16 from App Store, Record a Slow-Mo Video (1 Min Long) with Flash. The result shows the powers remain after 36 minutes testing are exactly the same 94%, battery score is just 1 point different out of 360 points. Except you are a serious daily benchmark addict or play video game with your phone 99% of your mobile phone time, I don't think there would be any different.