One big difference between the two was also in the dynamic aspects of the animation, the movements. Ang Lee and crew sought to make sure that all of the motions were very "real", and lacked a smooth, "animated" veneer. Minute stumbles and re-shifting of body mass, blance and momentum issues; it all played out beautifully - and viscerally - on screen.
I don't know the thought processes behind Leterrier's Hulk, and it very well could have been something similar, but, in the end, alot of the Hulk's (and the Abomination's) movements looked very neat and "animated". You don't really get the impression that those too beasts actually existed, and were interacting with real physical objects, as was the case in '03. And the car boxing gloves were a bit absurd.