“What memory does the unlocked US S8 use? There are reports stating that the US Snapdragon versions use UFS 2.0 (the older slower memory), versus UFS 2.1 (the newer and significantly faster memory). Why do the US versions use significantly slower memory?”
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According to Wikipedia, there is no difference in the maximum bandwidth (both at 1200 MB/s). However, even if there were a difference, here's a quote from XDA: "Theoretically speaking, the difference between UFS 2.0 and UFS 2.1 objectively exists and is large enough for phone OEMs to tout the superiority of one over the other. Practically speaking, most average users and even smartphone enthusiasts will not be able to distinguish between the performance of UFS 2.0 versus UFS 2.1, unless they compare both side-by-side. In real life and daily usage, UFS 2.0 will unlikely be the bottleneck in your flagship experience. Had Samsung gone for eMMC 5.1, the memory specification would have had a much more profound and noticeable impact on your experience. Thus as a silver lining, Samsung is only juggling between UFS 2.0 and UFS 2.1 for now." In other words, enjoy the phone.
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