In the early episode "The Hidden Enemy", the clone trooper Slick, spies on the Army of the Republic, using the justification that his brothers were "cannon fodder", while the Jedi easily survived battles. However, this seems to contradict "Attack of the Clones". The Kaminoans tell Obi-Wan that the clones are completely obedient.
Well, you are right, clones in Clone Wars cartoon are different then clones in the movies. In the movies we don't see them as anything more then "human droids" , they simply follow orders without sense of wrong or right. For Clone Wars they have been completely humanized- they have their own individual personalities, emotions and opinions. For example, Slick did what he did because he considered Jedi incompetent military commanders (which is true, because they didn't have the training or experience in military matters). To explain the clones' blind obedience in carrying out Order 66, Inhibitor chips were introduced.
What about complete obedience promised by Kaminoans? In universe, this could be explained by the fact that Kaminoans never had a project of this size before, and considered clone troopers as the pinnacle of their achievement, yet they were too aloft to consider that their "work" could somehow become independent from them. This was shown in episode Conspiracy and Fugitive, where Kaminoans clearly state that clones "belong to them", i.e only they understand their behavior.