One tire spinning keeps you more stable compared two because when both tires spin the rear end is completely loose and nothing is there to keep it from sliding around and hitting that car you are parked next to. With the open diff your drivers tire is there to stabilize you, hit the skinny peddle to hard and the spider gears that turn and allow just the one to turn, rather than both, explode because they do not have enough oil to keep cool and are spinning way to fast.
My Eaton LSD, clutch based, has rarely ever (if ever,) showed signs of "limited slipping" it has acted more like a locker.