If you're just comparing the aesthetics of the s8 vs the x, I think there's a compelling argument that the former is much more attractive.
If you're talking about the rest of the Design, however, I wouldn't think Apple's overall hardware and software cohesion is something that's been topped, despite lots of arguable problems with their software and lots of improvements on Android's part.
Side note: The physical interaction language of the X is an interesting thing. I can see it being potentially very problematic from an interaction design but the overall package could be appealing. I'd like to try it just as a matter of learning for my work. Other than that and maybe the animojis, the phone doesn't seem like a big deal. Honestly, it feels like an experimentation based mostly on aesthetics; not a bad thing, but not much of a leap either.