Herschel vs. Sanders in college

I know both were great, but who was the better running back while in college?

They are the two finalists to join RG3 on the cover of NCAA football 13.
I ask because I am too young to have seen either of them play in college and am curious about the great players before "my time."

BTW if you want to vote for either one, you have to like their page on Facebook.
LINK

Searched, but SIAP