I honestly hope you are joking. Of course, I'm not talking about what they say they're about. They have to say whatever is needed to make uninformed voters think they are voting for different candidates. I'm talking about what they do as evidenced by their backers: http://www.zerohedge.com/news/2015-04-15/enormous-differences-between-jeb-bush-and-hillary-clinton http://www.globalresearch.ca/10-ways-hillary-clinton-and-jeb-bush-are-basically-the-same-presidential-candidate/5456953
Jeb Bush and Hillary Clinton are almost exactly the same. Same can be said for most DC politicians regardless on what side of the isle they reside. I give Bernie credit for standing firm to what he believes as he is among the exceptions and not the rule. Hillary? Not so much.
Google will do just fine. If you like, try this link. Likely a bit much for your tastes (not many pictures or snarky memes), but nontheless there for your perusal if you actually care to know what you're talking about: https://votesmart.org/candidate/key-votes/55463/hillary-clinton
Carter was definitely more experienced in politics, but he was not a career politician. He actually accomplished something prior to getting into politics. Our short history is riddled with politicians first serving as war heroes, businessmen, more recently career politicians, lawyers, etc. Thomas Jefferson may have been the closest to Carter with respect to an understanding of scientific fields of study where they were able to actually apply what they knew with a high degree of expertise. Aside from that, no other presidents come to mind that were that intellectual.