I have a 2002 R72 @ did custom harvesting for a neighbor who had just bought a new 8010. We ran side by side on 2500 acres of soybeans that had 50 to 60 bu straw but only ran 25 to 35 because of hot wind and dry conditions. The 8010 had a new Macdon FD70 40ft header while I had a 36ft Macdon 974 flexdraper. Because of the very tough straw conditions I would say that the 8010 would do about 10 to 15% more. Considering the difference in cost between the 2 machines and him having 70 more horsepower I think the R72 did Quite well. If you make a few modifications to the R series gleaners they will eat. This R72 is set up with, 4strand feeder chains,lowered feed floor, Steep pitch helicals, bison rotor, rodono chopper. I also put the big pulley on the chopper so it has the same speed as the new fine cut choppers. Sounds like a lot of work but I set both of my combines up like this and now cut the same or more acres with 2 that I used to cut with 3.