B&M you compare tractors like the Kubota dealer does. Take the heaviest Kubota and the lightest JD. My neighbor bought a new Kubota 7040 decked out. And when he got it home it would not pull my 4 shank bottom plow. Now is when the story gets good, he always used my 5400 JD with the same plow to break his garden every year. The Kubota is a 4cyl. and the JD is a 3cyl. engine. He went back to the dealer and told them the problem, they said he needed to load the tires. They came and picked his tractor up brought it to Baxley and loaded the tires. Got it back and it still wouldn't pull the plow. I like Kubota and I own one but comparing apples to apples, there both good tractors.