Kevin, yup they look the same as those. They are all likely made by the same company, I like the wedges and never had an issue with them before. I don't use wedges a lot and was playing around trying to direct trees were I wanted them to fall and not in the direction they were leaning. It was a 20" ash that was pretty dry, I was hammering in with my hatchet and pow both wedges shot out the back and the tree fell the opposite way. Wetter wood might have been fine but ash is pretty dry so I figure the little raised notches didn't dig in much and the oil helped slide things along.
REALLY appreciate the heads up with them. I have a bunch of standing dead ash to work up next year and will always plan on them popping just to be safe.