Perhaps the problem is the veil? Or my interpretation of what a high extended treble should sound like (bright and crisp). I guess the extension could be there...and be higher but in this regard I would always expect something more bright and crisp if it is more extended. SE535 is brighter and crisper to my ears. UE900 and W4 are not bright and crisp because of the veil and is why they both sound a bit "off" to me. Maybe it is an unveiled midrange with SE535 making it sound like it has more clarity overall which I think it does.
Fill your pinhole bore, or put a piece of scotch tape over it. For some odd reason, mine sounds like it's already filled :p