No, the Grevious/Chancellor stuff is the same as in the book, I do believe. Of course the cartoons have skipped quite a lot of the battle that was in LoE. Mace is on planet as well. Isn't there a whole sequence with him and Kit Fisto? The weird thing is Anakin and Obi-Wan, who are on a totally different planets, doing totally different things, when compared to LoE. Anakin's trial would have to had to take place before the battle began to keep with continuity. But it does seem weird to intercut the two in CW (battle of Coruscant and Anakin's trial) if they're not taking place simultaneously. edit: I would say LoE is more canon. Lucas seems to have much tighter reins over the novels. Gennedy has said that Lucas just really lets them go with the cartoons, although there is an effort to keep continuity (though it doesn't really seem so).