As i only heard the HD 448 from the two, i can't tell you that these are the better option, or instead the Audio Technica's, as i stand 50% chances to get it wrong. So there will be no recommendation.
I can tell you the HD 448 is doing very nicely on vocal stuff, live recordings and string recordings.
Some reviewrs are saying they have no bass at all. I wouldn't say they don't have, it is just so shy. It never goes over the mids or highs, it always remains a background additon, but in certain songs, on certain instruments like a bass guitar or a double bass it can go pretty low, much more than you'd expect after listening to modern music.
I was listening today to Tom Waits and i was pleasantly surprised how nicely the guitar sounded. Definitely not expected knowing these are not bass heavy. As long as you listen to actual recordings, made from human voices and a band, orchestra with real instruments etc, these are very enjoyable cans for their price, but not doing exceptionally well on modern "made on PC" songs, where they sound just too flat.