There has been much talk about experience during this nomination cycle. The only other term, which has received more play, is electability and I believe the two are irrevocably entwined. So, I thought I would do an opinion-based comparison using the information that I have on both candidates from the primary.
Age
Edwards is 50
Kerry is 60
Advantage Kerry - 10 years of extra experience
Advantage Edwards - young enough to have missed the worst of those crazy 60's
Background
Edwards grew up without a lot of financial advantages had no expectations to go beyond high school. Went to college and law school worked his way through both.
Kerry grew up in privilege went to exclusive prep schools and Ivy League College as was expected also went on to law school and entered the Navy.
Advantage Edwards - overcoming obstacles and working hard to achieve a goal
Advantage Kerry - moving in elevated circles meeting and associating with important people
Personal/professional
John Edwards married, established and built an outstanding legal practice, dealt with a terrible family tragedy established an after school program and center, fought and won numerous cases as an advocate for average Americans against huge corporate interests. Made a personal fortune. Ran for Senator against an incumbent and won. Established himself as an important legislator within his first term.
John Kerry joined the Navy, served in Vietnam, was awarded medals, came home and was a leader in the anti-war movement, married, divorced, enjoyed a singles life, remarried , was a lieutenant governor to Ducakus, became a Senator who has served four terms. Was considered vulnerable and fought and won a hard reelection to his most recent term. Has established a reputation as a good investigator supports the work of others.
Advantage Edwards - proven ability to make commitment, develop and maintain important relationship 26-year marriage. Proven ability to beat incumbent Republican in the South. Proven ability to fight and win against huge corporate interests. Proven exceptional leadership within the Washington power structure.
Advantage Kerry - Combat experience in a war. More years within the Washington power structure.
I'm sure there are other areas I am missing but I think this is a good start. Experience is an important factor when making a decision about a candidate. I believe that a broad spectrum of experience should be considered.