I think a little too much is being made about this game...
A single shot decided the fate of the game, and the Suns would have had a strong chance of winning if Amare wasn't the one taking the last damn shot. The inbounder (Bell, I think) had a wide-open Nash to his left, but hesitated to pass it to him. That easily could have been the game-winner.
Like I said, the Mavs won because they had so many more shot attempts. That's a product of bad rebounding, not bad defense.
As far as I see it:
Offense: Suns > Mavs
Defense: Suns = Mavs
Rebounding: Mavs > Suns
If the Suns can pick up an able rebounder mid-season, that could be the difference. You guys can talk all you want about the Suns' "poor defense," but until you actually back it up with statistics, we as Suns fans can't take you seriously. The Mavs, after all, were up by 13 at two points during the game and ended up behind at the beginning of the 4th quarter.