1. Samsung decide to skip volume production of 20nm and went straight to 14nm ( What TSMC called 16nm ).
2. Initial projection of Samsung 14nm was supposed to be better then TSMC 16nm, hence TSMC has a new node in dev called 16nm+.
3. Apple may have decided on Samsung's 14nm last year, given the much favorable pricing rumored Samsung are giving them.
4. However Samsung 14nm has yield and performance issues and is likely not meet Apple's target and requirement in...