Not much analysis of what makes a country song (good, bad, or indifferent) country.
Here is an example that seems interesting to me: Emmylou Harris' live version of Carl Perkin's Restless from the Last Date album.
https://www.youtube.com/watch?v=GRDnHqGSysA
This song has some of the hottest country guitar playing I know of. The solos absolutely smoke. But I would argue that the sound is clearly country and not rock, and while it is in origin a rockabilly number, it comes down well on the "billy" side of rockabilly.
So. There has to be something that makes it come across as country. Tone? The notes played? Where they are played on the neck?