Oh, wait .... isn't this the semantics forum????
My neighbor wanted to move his derelict school bus. A 4.3 Jimmy in lo-loc wouldn't budge it. My <30hp NH 1520 HST with turfs got it going and 150 ft down the driveway at 1400 RPM before I realized I was in med-range and had left the brake locked on. I've been a Chevy guy for 40 yrs+, but can I now conclude that the 'Ford' is more er' efficient? (there's 4 letters vs 5 in the name, too) IMO brand loyalty is like hair color preference, and others might miss a point to be made somewhere. (anywhere?) Ford/Chevy=JD/Kubota? C'mon, guys. My point would be 'different streaks for different freaks', ie: apples ain't oranges.
At the simplest level weight, hp, & traction aren't proportional. The OP's Kubo also had to pull
itself, & it looks a tad bigger than his JD .... Couldn't hp or tires be the emphasis, and tractor brand not relevant?