Magneto wins in a curbstomp. His forcefield mixed with everything else, he could literally make yoda's lightsaber stab himself since the handle is metal. The force might not even effect magneto due to his forcefield.
"He been shown controlling the most insignificant magnetic particles in the both atmosphere and in living beings, reversing their blood flow or ripping out any ferrous elements through their tissues." -Comic Vine-
Magneto also has a crazy force field, and could simply look at Yoda and reverse his blood flow, he also is able to have anti gravity fields which would also make it a curbstomp match. He is immune to mind effects and has a near unbreakable forcefield, and can kill yoda just by looking at him.