Adding to all the other blokes who have chimed in, the RN6 is quite excellent with orchestral music in my experience and remains fairly robust with bass. It’s quite airy and spacious sounding and with the aluminium shells, was a lot more comfortable for me over long listening sessions.
The XE6 feels more confined but a more engaging, especially in the low end. I found that I was changing from track to track rather than just letting my playlist run its course in order to just see how it would perform in certain sections of certain tracks. The shells are comparatively heavy and were more difficult to get comfy with.
Overall I found the RN6 more agreeable but the XE6 more addicting if that makes sense.
PS: that 10mm DD can be EQ’d to absolutely ridiculous levels of bass with little to no distortion on both
Worth auditioning both before committing to a purchase. I'm one of the minority who didn't quite agree with either the XE6 or RN6.
XE6 has an impactful, engaging low end. Which may work with modern music styles. Dance, Trance, EDM.
But for orchestral, acoustic vocals the coloration did not align with my preferences. Vocals weren't as clear or musical. I've heard a lot of IEM's this week so forgive me if my memory isn't 100% correct.
I found the Radon treble as little too much ... but perhaps I could have tamed that with tip rolling. Trumpets, Cymbals, Taylor Swift's voice ... just didn't sound right. I actually cringed in some places.
Subtle little imperfections that mean whilst I enjoyed auditioning them, first impression was I did in fact pass on them.
My Top 3 IEM's that I've had a chance to listen to:
1. Storm. BA/EST. I don't know what they did to the BA's but it's one IEM where I haven't noticed BA timbre or noticeable bass deficiencies. Lovely reference and a full, rich sound. Great depth. No unpleasant coloration. Difficult to drive. >100 on the SP3000 and I gave up and plugged it into a portable amp. Works well with the 475.
2. Trialli. It's classic, safe, versatile. Holds its own. But beginning to be dated.
3. Yet to fill this spot. I'm enjoying the Mest MkIII with Sedna Xlastec standard tips but abhor the cable. Actually why the *redacted* does PWA not sheath cables like Norne, Cardas or a gazillion other cable manufacturers. It's near as bad as the thin metal cable ties that come with a power cord.