Chipworks: Both Samsung and TSMC are making the A9 chip for Apple

Ars Technica:

The only thing that most people will need to know about Apple’s A9 is that it’s a whole lot faster than last year’s A8. But for those of you who are more interested in chip design, Chipworks has unearthed an interesting tidbit: there are two different versions of the A9 chip, one manufactured by Samsung and another by Taiwan Semiconductor (TSMC). Most interestingly, Samsung’s version (the APL0898) has a slightly smaller footprint than the TSMC version (APL1022).

There have long been rumors that Apple was dual-sourcing the A8 from Samsung and TSMC, but this is the first visual proof that we’ve seen of the practice. iPhone and iPad processors up to and including the A7 were all made by Samsung.

This is really “inside baseball” for a lot of folks but it does beg the question of why is Apple doing this? To keep Samsung “honest”? Or are they prepping TSMC to take over chip design?