I thought it was pretty amusing, the Kubota video making their shorter ROPS out to be a feature. The Deere dealer I went to when I was shopping had a Kubota B series on the lot and did a demonstration where you sat in it and he pulled a string from the top of the ROPS to the front of the hood, showing that the "safety triangle" was not tall enough to protect your head. At the time, I just sort of nodded along, but I have come to think that's a little disingenuous of an argument. First, all ROPS must meet federally mandated safety criteria, so they are all at least a certain amount of safe. But second, a ROPS is, as I understand it, first and foremost there to interrupt the tractor's roll and prevent a full inversion in the first place. Most rolls involve the tractor falling on its side, not turning on its back. And Kubota's shorter ROPS probably works equally well in that case. I wouldn't be surprised to learn that Deere's taller ROPS is required for some engineering reason other than safety, and they're just trying to make lemonade out of it.