Why aren't they the same piece of info? Scores just reflect popularity, not expert analysis. I find scoring systems like at reddit or slashdot just promote, usually wrong, group think (ZOMG OBAMA IS A COMMIE KENYAN!!) or whatever group values the majority accepts (GAYS SHOULDNT GET MARRIED!!).

There's a lot of faith in the wisdom of crowds with these systems and that's not a faith I find particularly convincing. The lowest common denominator shouldn't be encouraged. These systems are good for getting rid of trolls and other cruft, but not magical quality or truth machines.