but why. saruman can cast fire balls, lightning over vast distances, voice craft, power to drive out the necromancer with the white council, he was the head of the council too, he is a maiar whilst she is just an eldar? (i dont disagree just playing devils advocate)
Morgoth probably couldn't resist The Ring. No one but Tom can. Point taken though, but Saruman hadn't even see it and might as well fallen to it.
Saruman in his incarnate form is forbidden to use his full power, and that might give Galadriel the edge if she possessed the Master Ring. Still, Saruman is one of the Maiar and is presumably more powerful than the Queen of the Golden Wood under normal circumstances.