I have also visited both of them. They are not very far apart, and if you are on I40 well worth the stop. Like Jack said the one in Clinton may have a bit more gasoline stuff, however both are full of Rt. 66 memorabilia and a lot of Oklahoma petroleum history. and dust bowl pictures, and history of the highway, also talking informational tours inside the museum which covers automobiles, motels, drive-ins, car hops, music, filling stations, etc.