Based on nomenclature alone, the 10R80 ("10" forward gears "R"ear wheel drive based, "80"0 (800) newton meters (590ft-lbs) torque rating) is a more durable version of the trans than the 10R60 (same as previous except "60"0 (600) newton meters (442 ft-lbs) torque rating). I'm sure the gear ratios are different as well, but I do not know anything about that.