Google Pixel 7: flash storage from different vendors have different performance
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"Having said all that: Will you actually notice any difference your usage? Pretty unlikely. I've seen no changes in real-world benchmarks. Also multi-sourcing is pretty common in the smartphone world (Apple does this a lot)"
Yes, but Apple put a lot of effort into making sure their components are as similar as possible, from Speed / performance down to reliability and Power usage.
The benchmark here doesn't seems to show that.
And that is speaking as someone who is Anti-Apple.