FYI, the Zu Soul Superfly is a wonderful sounding speaker. To put things into full context, to me the Zu Soul Superfly has great presence and has better soundstage and images a bit better than the Zu Druids and has more bass and detail without being at all harsh.
Also the midrange of the Zu Soul Superfly is still very warm and yet the overall sound true to Zu is very dynamic and quick. Also, the stories of the highly efficient Zu speakers lacking bass is for the most part, only true below 40 Hz. The mid bass presence is impressive.
However, with that same amp, and all other components the same, the slightly clearer and more extended Zu Soul Superfly was just a tad less warm and dark sounding as the Druids. Although the differences were not huge, I prefer the warmer druids myself since I on balance give preference to warm and dark. Obviously, many others, perhaps most, will find they prefer the Zu Soul Superfly as it produces some incredibly delicious sound.
The question remains though (assuming the audiphiles remark about preferring the Tektons as the Omens sounded to him warmer and darker than perhaps even an older different version of the current Tekton KatzMeow and he wasn't changing amps, cables, tubes, room, or even at a friends house), since the Soul Superfly with its high end wiring and crossover is probably a little more open than the budget Zu Soul with its pure copper wiring, how does the Superfly compare to the Tekton Katz Meow.