I've had three Kubotas and just got a DX33 a few months ago. Both are excellent tractors, however a B series Kubota does not compare with the DX 25,29,33 models. You would have to look at the Grande L series from Kubota to make a comparison. The DX is a larger frame tractor than the B. The reason I switched to Case is I have a bulged disc and pinched nerve in my back. The seat on the Case fit me better and had more support than any seat I tried on Kubota. Either brand will run you well. The Kubotas I had seemed darn near indestructable. The Case looks like it will be on the same order. My Case dealer is having trouble getting new models also. If you can find a Case,it will be cheaper to buy than the new Farmalls. Same tractor, go figure.