The biggest difference between the two combines in my opinion was the size of the feeder. The 14's feeder was narrower and was the restricting factor of it's capacity. We had both models with rodono hydraulic revercers on them.(a must in canola) I remember the first day with the 16's we were calling for fuel filters as we able to feed so much more material into them. We used a 836 versatile and a CIH 7130. Both had power shift. Replaced three gear boxes in one,none in the other. One advantage was the fact that we didn't have two cumming's sitting idle 11 months of the year.