Being a long time wilson 90 user I think the yonex is alot easier to play with than the black red BLX version. I think I hit a better serve with the k90, but the string bed is just so forgiving, you rarely shank and miss hit. I have played about 12 hours or so with mine and really enjoy it. Overall it has a little more power on tap than the wilsons, but has the same degree if not better directional control. Volleying is about the same maybe a slight nod the k90 but note the blx and the ncode, they were sort of meh in my book. I would definitely give it a demo.
Luxilon....10/10 would big banger