Not trying to be a prick here, but maybe you should read the caption of your linked image. "The SSR Series of Super Swamper Radial/TSL
tires is the next generation of light truck radial tires". Bottom line is that the tires have molded raised letters stating TSL on them. It isn't that difficult of a topic, don't get SO UPSET. the two seem to be related in more than just manufacturer, they seem to be of the same TSL family of tires. Is it possible that they changed the sidewall design the way other tire manufacturers have in the past 5 years? Make no mistake, I see the tread pattern difference, but when the people who made the tire call it a TSL in bold letters - it's a TSL whether we like it or not.