Actually my favorite analogy for the US-French relationship is younger brother-older brother. To everyone else they seem exceptionally similar yet they have a sibling's perspective of each other- completely out of proportion of the world. The older brother was considered something of a prodigy, but was the sort who would rather go travelling the Continent and sleeping in hostels right out of high school. The younger brother went straight to the show, got his MBA went to work. Older brother went and got his law degree, worked at a community law center and talked only of injustice. Younger brother got rich at a firm... soon everyone was pointing out what a success he was; often implying the missed expectations of the older one. Older brother criticized his betrayal of idealism. Younger brother responded by pointing out how older brother's idealism lead him to act without concern for the results of his actions. For every bad thing one could point out in the other, it wasn't long they'd find something similar pointed out about themselves.
Now watching them talk is the drunken part of a family reunion. Sometimes it's funny. Brothers wrestling still. Other times the venom can evacuate the air from the room and make everyone else want to disappear.
I think of watching Robert Crumb and his older brother in the documentary Crumb. Or the Italian movie The Best of Youth. It's how families are.