Morgan,
The power cords are good, but they aren't really the moral of the story. It was that a subtle change was able to make me realize the potential and keep soldiering on to find something I liked when I previously wasn't impressed.
In a quick nutshell:
VR-33s are significantly more laid back in character and not quite as dynamic, though they aren't poor in that regard--the Zus are just VERY dynamic
The VR-33s throw a much bigger sound stage, but with noticeably less precise imaging.
The Zus have a more harmonically developed, meatiness to them and capture texture of gruff voices a bit better (Gil Scott Herron, Tom Waits, Ray Charles, etc) but the VR-33 is still full bodied and pleasant.
The VR-33s tweeter is more relaxed but equally detailed, a bit more refined. Theres also a little more upper midrange refinement in the VR-33s
The Zus have more punch in the bass, but the VR-33s have more bass information going significantly deeper.
The Zus may have been a splash more engaging emotionally for me, but are a bear to set up perfectly while the VR-33s are 5 inches from my front wall and sounding darn good.
The Zus are more versatile speakers whereas the VR-33s are pretty good all around, but may err towards the polite. If I want to throw on indie or hip hop (which I do with the Zus) its less at home on the VR-33s.
For my current situation, I'm going to keep the VR-33s, they're perfect for a living room. When I move and get a home w/ dedicated listening space... well, hopefully Zu Def 4s will have hit the used market :)