I don't recall asking about Cat combines, and the reason for that is that there are NO Cat combines in this area, even with a very strong Cat dealer only 40 miles away. If you think there are no differences between the 9750 and the 9860, you clearly haven't looked at them side by side. The 9860 has a 12.5 liter engine compared to the 8.1 of the 9750. It also has the 3.3 bushel_second unloading system standard, while it's optional on the 9750. The 9860 also has single-point header hookup, which the now-discontinued 9750 NEVER had. It also has the pre-set adjustments, electronic chaffer and seive adjustments, and a bunch of other features never found on the 9750. The chopper was also redesigned. So no, the 9860 is not just a 9750 with a big engine. I just want to know why although the 8010 is so superior, why Deere is putting the 9860 in fields, while the 8010 is apparently reserved for farm shows and demos. And why do they keep burning upIJ