It's not even a recent thing. Way back when Apple used both TSMC and Samsung foundries for their A9 SoC's, the Samsung ones were measured to perform worse than

It's not even a recent thing. Way back when Apple used both TSMC and Samsung foundries for their A9 SoC's, the Samsung ones were measured to perform worse than the TSMC ones. https://arstechnica.com/gadgets/2015/10/samsung-vs-tsmc-comparing-the-battery-life-of-two-apple-a9s/ https://arstechnica.com/gadgets/2015/10/samsung-vs-tsmc-comp... It's just the gap has become more noticeable in recent years. (Notably with things like the Snapdragon 888 handwarmer).