The "loosy" wing at W1000X only for the earlier/previous year batch.
Start from 2012, all W1000Xs that I met already have a nice fit, looks like ATH listen what people complain about the old wing on them. (The design is still same, but ATH do something to them so they has better clamp on head)
Never test Ax000X series, so I don't know much about them
In may 2011 i ordered a A2000X from pricejapan , nice service , i would have kept the can much more longer if it didn't fell from my head at first movement , great sounding but the loose fit was defenitevely a deal breaker for me , but if they fixed the loose fiton newer batch , it's just nice i don't plan to buy any AT headphone soon , but will folow newly developement , and how the new AD Serie compare to the old one .