Romney-Clinton voters are more likely to live in a suburb, especially in the Sun Belt. They tend to be socially center-left and fiscally center-right, while Obama-Trump voters tend to be socially conservative and fiscally liberal, and more likely to live in the North. Obama-Trump voters to tend to make less money are less educated, are more likely to male, and less likely to live in a city or suburb than Romney-Clinton voters.
This; GregTheGreat657's description is completely accurate and very detailed.