after 3 in-game wears of the Hyperdunk 2010, I found them unrelentlessly stiff around the ankle, higher cut than I imagined, and a bit too loose and flimsy in the forefoot. However, I may have narrower feet than other people on here (the AJ XII retro is my favorite balling shoe of all time due to the way it fits my foot perfectly), so who knows. Traction was very good, though...
In contrast, the Hyperfuse is my favorite shoe to play in other than the XII retro or Kobe 4, and has far superior breathability. I don't really notice the lack in heel cushioning that some complain about, but the Cushlon in the midsole more than compensates for no heel Zoom or Air for me. Plus, the tighter fit makes my foot feel very secure. Traction is just as good as the HD 2010.
I am a 6'2" 175lbs wing, and rank the Hyperfuse ahead of most other recent Nike shoes for bball including the Hyperdunk 2010, OG Hyperdunk, Kobe V, and AJ 2010 Team. In fact, they are the only shoes I currently enjoy playing in more are the XII retro and maybe the Kobe 4.
for me, Hyperfuse >>> Hyperdunk. And it isn't even close.