Hmmm - I'd respond to this question with a question - WHICH Heresy versions do you own?
The Heresy 1 versions do have "horn sound," but the T-35 tweeters do an amazing job on cymbals & brass
The Heresy 2 versions are even more horn sounding, but this can be ameliorated by putting some wave guides (ping pong balls, usually) in the throats of the mid & tweeter horns.
The Heresy 3 versions with the titanium drivers are faster sounding than any of the previous versions, but have a slight midrange dip, to my ears. This adds imaging, but at the expense of verisimilitude on male voices.
Yes, the Axioms are more accurate than any of the Heresy models, but they lack the "jump factor" of the higher sensitivity Klipsches. The Heresys, when placed on stands, used with a good subwoofer, and carefully toed to avoid the bright spots, can provide a "you are there" experience that the more accurate Axioms are hard pressed to match.
So for frequency neutrality, go Axiom. For dynamics, go Klipsch.
