I think General Grievous would win. Because Maul only has two blades, Grievous has four...

BD

That's stupid, Obi-Wan beat Grevious with one lightsaber, Maul all the way!!!

Shortly before the Battle of Yavin, a dark side splinter group called the Prophets of the Dark Side managed to resurrect Darth Maul. It is unknown whether this Maul was created through cloning techniques, by using some form of Sith alchemy to restore and reanimate Maul's actual corpse (which was destroyed in the Naboo Reactor Core Room), or through other means. The Prophets themselves stated that "there are techniques to mold a being in every way." As an example to the lesser vassals of Palpatine's Empire and to put an end to the tainted Sith Apprentice, Darth Vader was chosen as the first target for the dark warrior. These dark side worshipers believed Vader to be too much of a Jedi to be a worthy Sith Lord.

On the shadowy volcanic moon Kalakar VI, Vader thought he would intercept a Rebel courier with the stolen plans to the first Death Star. Instead, he was met by a reborn Darth Maul and the observing dark acolytes. Darth Maul then dueled Vader on equal terms, but gained the advantage late in the duel. Yet, in the final moments of the battle, Vader surprised Maul by stabbing his lightsaber through his own body (and, through proximity, Maul as well), damaging his own circuits and almost losing his own life in the process. With Maul defeated, the observing acolytes were executed by Palpatine himself for their "treacherous" act towards his rule.

,and on top of that  Vader beat Maul in a duel to .

When did Vader Beat Maul in a duel???? What are you talking about? Am i reading this wrong?

lol just kidding,I still go with Maul because he feels the Force.That gives him a huge advantage.And to all of you who will say"Oh but he beat so many Jedi"I will tell you that he uses the Dark Side of the force.That gives him more power and aggression at hand,and that's what is needed in order to beat the "techological miracle" Grievous.

I love grevious, but I think mual would win, he is more highly trained and just becuse me havent seen him use the force doesent mean he cant use it at all !!!!!!!!!!!

I don't, he doesn't show his four arms right off,like he did with Obi-wan.