Just recived my UE 900 yesterday. Compared to TF this sounds more natural, with better mid and high. Bass seems to be more accurate and precise but with less "punchy" to my ears.
This are not burned-in as TF but the overall sound quality is better and absolutely top-notch. I think this is a more audiophile sounding headphones.
the comfort has been improved a lot, just like the astonish cables, really pretty, wich tend less to tangle and with great performance!
What a GREAT headphones!