If your experience of watching these sports is limited to a couple hours once every four years, luge, skeleton, and bobsleigh look pretty similar. That's especially true if you're watching doubles luge and bobsleigh.
Despite all three sports taking place on a sled in an ice tube at high speeds around blistering curves, there are key differences between the games. (Even ones that have nothing to do with Cool Runnings!) Here's the difference between luge, skeleton, and bobsleigh (or bobsled).