I'll try to keep it simple... both rackets feel pretty stiff. The BLX Blade does offer more control I feel, because of the closed string pattern. It has a high SW that makes it pretty sluggish. On the other hand, the Yonex has a ton of pop but also surprising manueverability for a players' frame. In my opinion the Yonex is a far better racket, because it does everything the Blade does except it does it better. BUT I'm biased because I'm still disappointed that Wilson continued to stray away from the amazing nBlade feel with the Kblade and then the BLX Blade.
If it ain't broke don't fix it... Babolat Pure Drive Team.