off hand without looking at my notes 2006 yield monitor standard, 300hp 24 valve sisu(r-65, not sure about hp one r-75) engine, different brand feed chain, elevators adj. from bottom and top, raised push buttons on eip, the cdf rotor is a must in corn and soybeans (makes it a totally different combine),hump door and 3rd helical a must also. will look up more differences and let you know.