For detail, I think it's a win for the Xelento - it has better treble extension (better even than the SE846 with the brown Knowles dampers mod). I never hear or worry too much about differences soundstage. A wide soundstage is an artifact that an IEM shouldn't give - not unless you have a proper binaural recording. I may be a bit unconventional in that regard, but I love the IEM experience of the sound coming from inside my head - as long as it has the clarity and detail. And if I want a genuinely accurate wide soundstage, I use this software:
https://fongaudio.com/out-of-your-head-trial-download/ Dynamics are a wash - they're both excellent headphones in this regard.
Be happy you can't get customs. They're massively over-rated, IMHO, for many reasons: 1) Despite what you might have been told, they will never give you the same level of isolation that you'll get from a UIEM with something like Comply foam tips. (The people that tell you otherwise are simply the ones who couldn't get a proper seal with foam tips. Measurements don't lie and aren't subjective!) 2) They're a total crapshoot in terms of FR. Your ear canals and conchal bowls are unique - as a result, the length of the tubes running from the drivers to your eardrums will also be unique to you. So you'll never know where those resonant peaks are going to land until those customs finally arrive in the post. And then if you don't like the way they sound, good luck getting a refund. 3) Good luck re-selling them when it's time for an upgrade.
Those last two sentences are exactly how I'd describe the Xelento. It's certainly detailed. No way is it shy on bass. These sound like your perfect headphone?!
@twister6 - I don't want to derail this thread, so pm is on its way to you about measurements...