- [Tom's Hardware] iPhone 6s: Samsung & TSMC A9 SoCs Tested - Same level of performance, but Samsung's 14nm FinFET process appears to offer slightly better power efficiency, extending battery life between 3.5-10.8% http://www.tomshardware.com/news/iphone-6s-a9-samsung-vs-tsmc,30306.html 41 comments apple