Mr.Mxyzptlk
What?
If we're talking about Movie Vader, then his "speed blitz" is about the speed of a Volkswagon with three wheels.
And I assume you aren't using Obi-wan's and Qui Gon Gin's force speed example in that insult. Original Trilogy Darth Vader.
Qui Gon and (I'm assuming) Young Obi-wan don't count.
Now, if you're talking about RotS Vader, then Voldemort wins on wisdom and experience.
Magics can defeat Superman. It's reasonable that Vader's "Sith Power" can be halted by a few well-placed spells from such a powerful sorcerer.
On the opposite end, Voldie still has trouble killing a child.