Biggest issue with the ford tractors was that the oil pan was part of the frame structure--even Formula 1 and Indy cars adopted that in later years--
The Farmalls benefitted in later years from battery ignitions( vs mags ) and overdrive transmissions--not to mention more comfortable seats with progressive spings and shock absorber, and of corse as all tractors---bigger pistons and sleeves---some were wet sleeves/ some dry----and rubber tires!!!!