The main difference between these two drinks lies in the type of spirit used: Kentucky Mule: Made with bourbon, this version ...

This Tennessee mule has what you expect—gingery bite, bubbly buzz, and lime tartness—but it's made with sweeter whiskey instead of vodka.

Other than, perhaps, regional pride, common local food pairings, and implicit sports team affiliations, there is just one tiny but critical detail that sets a Kentucky mule apart from that of its ...