I think the biggest difference is one intangible - Deron as the undisputed leader on this team. As you probably know, I'm a huge Carlos Boozer fan, and co-leader Boozer always brought positive energy, always encouraging and keeping his teammates upbeat.
That's important, but to be a great team you need your leader to bring toughness, an indomitable will to win and accountability so that his teammates know if they screw up he's going to get in their face, not give them a high-five.
There was a play last night in the 4th when the Jazz were up 15+ against the Pacers where DWill ran the whole way across the court to double-Hibbert, than ran back when he kicked the ball to Collison, d'up on on him and forced Collison to take an off-balance 20-footer w/a hand in his face. When your teammates see their leader busting his butt defensively in a blowout, that spills over and everyone picks up their defensive intensity.
Offensively we're still not scoring or shooting the ball close to the levels we've been the past 4 seasons, but our improved team defense has been the difference.
Opponents' Pts/FG%
08-09: 101/46.4%
09-10: 99/44.9%
10-11: 96.9/42%