the ts-1 is rougher looking. that's the only way i think i can describe it. the 452x is sleek looking and not quite as shiny as the 8125. i don't believe any of the bowtech binary cam bows have come with ts-1. besides the fact that its not available right now (military), i believe it stretches way too much for one of those bows. i know when i talked to todd and casey about the old glory string length change they checked to see if i was using 452x.