so far the biggest change I've noticed, besides the imaging and more realistic staging ( bigger sound stage) , is how articulate they are.... when listening to applause you hear much more of individual clapping ( if you understand what I mean), wire brushes on snare drums are amazing detailed. piano notes are much more individual as are stand up bass notes.... pretty cool. Nice that these were "used" and are already pretty well broken in....
Watched/ listened to Rouge One on BluRay last night.... wow. The Q900s are much better than the DQ-20s as sound surrounds. Audibly its pretty obvious that all the drivers now have a much more similar "sound".
Can't wait for the matching center channel to arrive in a couple of weeks.... as good as the Q600 is, it's now the audible weak link.
