I think RT is code for the latest reason they would like us tripping over ourselves to ‘Replace Tires’. All kidding aside, it’s just an updated version of the Duratrac tire. I have them, and also too little experience with them to judge their relative value. I agree with Teck, Falken offers more…tire. That additional tire mass might be steel, rubber, polyester, or all three - I don’t know. My prior LT tires offered more mass too. Horses for courses I suppose, and plenty of folks love those horses for honest reasons I’m certain.