In a statement given to TechCrunch, Apple says that the tests used to come to this conclusion are not indicative of real world use, and that its own data suggests that the difference is within a couple of percentage points – well within the margin of error when these kinds of chips are being made, no matter who is making them.
With the Apple-designed A9 chip in your iPhone 6s or iPhone 6s Plus, you are getting the most advanced smartphone chip in the world. Every chip we ship meets Apple’s highest standards for providing incredible performance and deliver great battery life, regardless of iPhone 6s capacity, color, or model.
Certain manufactured lab tests which run the processors with a continuous heavy workload until the battery depletes are not representative of real-world usage, since they spend an unrealistic amount of time at the highest CPU performance state. It’s a misleading way to measure real-world battery life. Our testing and customer data show the actual battery life of the iPhone 6s and iPhone 6s Plus, even taking into account variable component differences, vary within just 2-3% of each other.
While that likely isn’t going to stop some people from complaining that they have one of Samsung’s ‘bad’ chips rather than a ‘good’ one from TSMC, Apple says that its own stats say that it really doesn’t matter which your iPhone is using. So that’s that. End of story.