Prince Fielder or Joey Votto, which 1st basemen is more valuable?

Votto all day. Look at his year last year. He played well 2 years ago, then was "hurt" for the remainder of the season. Last year was amazing, whose to say he cant get even better. He hits for great average, Rbis and get just as many homers as prince. If prince struggles, his power goes down, and its tough for him to break out. Votto bounces back from slumps quickly because he is just a better all around hitter.