I don't think the Watt Puppy 8s are available yet. Zu has no U.S. dealers. I doubt you'll find anyone who has really heard both in good circumstances.
Watt Puppy 8 vs. Zu Definition
There is quite a heated debate here on both of these loudspeakers. While I much prefer the build quality and appearance of the Wilson's, I want to comments on the absolute sound quality between the two. Please comment only if you have actually heard both of these speakers and tell me which one you think ultimately sounds more musical.