i've heard the hd800 and hd800s a number of times and have compared them directly to the utopia. i didn't buy either of them but i bought the utopia, so i obviously think that it does things that the hd800/s don't.
that's no slight against the sennheiser's btw.
there's no denying that the utopia is an expensive headphone, but to say that it is overpriced implies that you know what its actual price is or should be, and i doubt that you do as only focal would know that. to say that "the clear is better, even disregarding price" is your opinion, which you're entitled to of course.
the problem with sweeping generalisations like that is they don't apply to everyone. i was interested in auditioning the utopia but had no intention of buying it. several months, auditions and a price drop later, i'd done the previously unthinkable. the clear's treble is more even according to tyll hertsen's fr measurements but that doesn't tell the whole story as we know. it doesn't indicate how the utopia's lighter and more rigid beryllium driver compares in performance to the clear's heavier and less rigid aluminium driver in the areas of resolution and imaging, for example. i think that the introduction of the clear has more to do with focal identifying and filling a market segment between the elear and utopia rather than it being an attempt to redress the faults of those models as you see them. focal can do that by introducing new interations of the elear and utopia. anyway, back to the hd820.