Not to speak for Wapiti, but I’ve had a decent amount of experience with both optics now. And can at least mention the comparisons from my POV
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The NX8 does get the slightest edge in glass clarity after putting them side by side and going back and forth all magnification. Just to make that clear right out the gate. Not by a huge margin, but NX8 has better glass/image. Also has a less stiff Parralax dial.
IMO the Tenmile has a better FFP reticle for hunting. Better illumination system. More pronounced/crisp turret clicks. More forgiving eyebox (even though the NX8 isn’t terrible). Numbered Parralax for resetting to a clear image more easily as a baseline.