Quote: Why is the Apple logo the coldest part for the Samsung version?
It's colder for both versions, because the logo is a separate piece that's made from a different material than the aluminum housing with different thermal properties.
- Matt Humrick, Mobile Editor, Tom's Hardware
關於溫度梯度, 人家是這樣問的
The skin temperature picture proves that you don't treat both iPhone6s equally.
The Apple mark on Samsung one is cooler, and Samsung one has more heat spread to bottom right than TSMC one, you should keep both iPhone under the same condition, not let one have more air flow, another has less.