Samsung is 14nm, and TSMC is 16nm. Theoretically, the Samsung should hold in edge in battery life, performance, heat, etc. http://demo.hiraku.tw/CPUIdentifier/ The above site will tell you which chip you have (some other member posted this in a frontage thread). Personally: Silver 64gb iPhone 6s Plus: TSMC chip. Andantech explains it better: http://www.anandtech.com/show/9665/apples-a9-soc-is-dual-sourced-from-samsung-tsmc Based on what andantech says, we have to assume either the above "CPU identifier site" is a software based identification method, or total BS.