Ultralight,
I compared the Zen and Glow mainly on the desktop. The Glow has some feedback thus a little more control of the driver than the Zen which has no feedback. In a desktop situation I like the Glow. In a room I like the Zen. With the flyweight drivers of the Omegas, the low damping of the Decware is a plus as it allows more driver excursion, thus a fuller sound and more bottom end. That said, the Glow will still do a wonderful job in a room situation.