Grandpa has been running IH/Dresser dozers since he started in the business and we still own one TD-15C, the other one is own by my current employer. Everyone calls it the little dozer but it will out push, out manuver and use way less fuel in a days time than our D6H will. Sides that, on a cold cold day that 15 with a canvas on the inside of the side shields, two small boards on the sides where you enter and the fans turned around will bake you out of the seat(i have dozed in 0 degree weather in a light sweatshirt before), while the 6...we work out butts off to try to find some heat on it. Everyone that has actually spent time on it would rather get on that than the 6.
Trbo