what is the point of comparing a specialized machine with a tractor nozzle? A tractor can work in the field with a plow, but this wheelbarrow can only cut the grass and that's all.
In most places in Italy where these machines would be used the only thing that the tractor will ever do is mow because you have to pretty much take the entire tractor apart just to take the mowing rig off. Energreen can also grind stumps and do other things.