You might want to look at the Geetech website, where they show the logos of many of the brands they make. I’m not saying the tools are all the same, or even that every tool of a brand comes from them (Geetech), but it shows you why I consider them all about the same. Note they show both the Grizzly and the PM logo among the group.
"I long for the day when coke was a cola and a joint was a bad place to be" Merle Haggartd