I have to say in searching this forum, I have read about more issues with Leica's mainly the Ultravids and even the FL's appear to differ fairly often in image quality. ALso the FL's have had what 4 changes in 3 years?
It seems like swarovski doesnt get reports of armor peeling off, poor focus knobs (slow focus yes but was remedied) or varying optical quality binos. I havent read many people say this EL was good but i have seen some bad ones...
What do you guys htink?
It appears that Swaro would have the best quality control out of the big euros or the least variation in consistency??
You can just do your own QC by buying more than 1 pair and keeping the one(s) that pass 
I am new here and I have recently bought my first pair of Zen-Ray but I think I can anwer this question with another question:
How many people do you think that can pay for a Swaroviski? The percentage is low and so the number of people who complains about it.