HP is the only difference in the CR's 940 and 960.The CR's are at least 10,000 pounds heavier too, so they need more HP.I found that the 940 is under powered in most adverse conditions like mud. This year with green soybean straw the 940 needs more HP. The CR's with the longer rotor's, self leveling shoe, and the rethresher are a much better machine, really unmatced in the industry.