On a more sonic note (pun intended), I wanted to point out that bass response below 20 Hz has a lot to do with sound stage size, not just the high frequencies. We use the low-bass info to determine the size of a 'room' much as we use higher frequency info and inter-aural arrival time differences for positioning info. So, it should be no surprise that the 200 has a bigger, more defined sound stage... (try this at home with a good speaker system and a great sub - when you have it dialed in correctly, when you turn off the sub the sound stage collapses....)
Also, speakers (or cans) with rolled off bass, but extended highs will sound bright, even if they measure flat across their actual bandwith. So, the lower into the bass they go, the more highs they can have and still sound balanced.
just my 2 cents worth
ok, back to clikcing 'track' over and over again!