Well this is a strange thread, gonna be some heat on this one...
In a good room with acoustic treatment, ceiling, floor and sidewalls at first reflection points the older wilsons sounded to artificial for me.. But I only heard a couple times, and really never spent time with them..
zu is a whole different approch and sound, nothing in the audiophile book really matches up to these speakers, advocates of the big name scan speak, seas, morel, focal etc... drivers will not like the fact that someone would believe a 10.5" driver with no crossover could do any justice to midrange like their 5" with a silk dome MTM array. But I owned Countless pairs of dynaudios, JM labs, Klipsch, B&W etc.. Nothing I found in the pricerange even remotley comes close to the sound of Definitions, but they are active speakers in the lower freq's and very high efficiency, so dynamics are very different than the blanketed audio standard designs, You better listen for yourself, as Price is the determining factor in this case, MY OPINION of course.... A 9000.00 dollar pair vs. 28,000 pair I am sure has some weight on what is warrents enough is enough? I can't say that Dollar for dollar either is a better speaker, I am sure they both have the same commitment and care taken to produce the audioband the way each is intended, which one is worth the hassel more to get the best electronics or performance out of them? That can never be answered for everyone on a thread like this...
2 Alien speakers to each other in terms of design and execution, you absolutley have to listen to either yourself and decide where each falls into this equation, because this thread will become Banter and pointless for anyone reading it that much I can pretty much let you know. Good products, bad over the top comments will be made. But the new wilsons are suppose to be very smooth and not as edgy and artificial as previous highs from my understanding so its worth a shot if you got the cash!