That's strange considering that I generally agree with your assessment of earphones.
I have both the HT06 and the XE800. I find them somewhat different in terms of sound signature. The soundstage on the HT06 is definitely wider but the high end treble on the XE800 is definitely sharper/brighter. Both deliver very good detail but the HT06 being a little smoother in the rendering and adds a touch of 'airyness' to the overall sound.
I have listened to Samuel Barber's "Adagio for Strings" on both, the HT06 will not invoke the lyrically emotive highs of the piece. It sounds almost too smooth although not lacking in detail. The XE800 plays it back with the sharp/bright detail that's a little on the 'piercing' side of things but with it, brings out the emotive delivery that the piece calls for.
But in terms of bass, the HT06 is definitely stronger in that aspect. The XE800 needs foam tips before the bass is of reasonable level for a lot of music genres.
They are both very good at details, but their delivery is somewhat different at the very high end of the treble spectrum.
But if you are not looking for these sort of nuances in the music you're listening to, the HT06 is the more well rounded choice.