One scores higher than the other.
Sanders:
Rated 93% by the ACLU, indicating a pro-civil rights voting record. (Dec 2002)
Rated 100% by the HRC, indicating a pro-gay-rights stance. (Dec 2006)
Rated 97% by the NAACP, indicating a pro-affirmative-action stance. (Dec 2006)
Clinton:
Rated 60% by the ACLU, indicating a mixed civil rights voting record. (Dec 2002)
Rated 89% by the HRC, indicating a pro-gay-rights stance. (Dec 2006)
Rated 96% by the NAACP, indicating a pro-affirmative-action stance. (Dec 2006)
http://www.ontheissues.org/senate/bernie_sanders.htm
http://www.ontheissues.org/Hillary_Clinton.htm
Just a taste, I would like to see all of them score 100 on the NAACP rating.