To a neutral observer, the only real difference between McDonald's and Wendy's might appear to be cosmetic. After all, each fast food chain is a literal behemoth of the quick-service world, slinging ...

You probably order burgers without thinking much about the beef behind them, but there’s a clear reason Wendy’s fans brag about their patties while McDonald’s fans stick with the golden arches.

For many years, the smiling clown Ronald McDonald was one of the most famous faces in fast food. With bright red hair, a painted smile and a yellow suit, he welcomed families to McDonald’s restaurants ...