I was busy for last few weeks. But I have been testing whenever I can .I guess Zelda is still doing A B testshyeah:
Good one. B6 must be one of the most reviewed and tested pair of speakers.
My initial impressions are that both has got different signatures. Z3 is towards warmer side and is more prominent in higher end frequencies and vocal where as Elacs are more focused towards Low ends and mids. This is not a good or a bad thing for any of the contenders but these characteristics define their signature.
Since the Elacs has lesser sensitivity, if you switch the speakers using A and B on the amp , the elacs produces less volume and this makes you think that you are missing something when compared to Z3. But I raised the volume a bit when I switch to Elacs for a fairer comparison and I made the observations in this volume settings.
In short Both are excellent speakers for the price and there in no better speaker. It all comes to your personal taste as Andrew Jones used to say in all his talks "It's like what flavor do you like"