It’s _mostly_ kinda sorta like that. There are broad groups that are basically the same; Craftsman and Dewalt being owned by Black and Decker, for instance. But it’s a crazy web depending on particular tools or features it goes from a couple root manufacturers to a dozen or so. But there’s a lot of BS.

Pro Tool Reviews did a big break down [0] a while ago that was very eye opening for me. It could easily be out of date by now but I had no clue how deep the groupings went at the time.

[0] https://www.protoolreviews.com/power-tool-manufacturers-who-...

This is mainly because power-tool quality across the board has greatly increased - once you're into a "band" they're much the same, though there are differences it's usually one of "focus" not of quality.

If you're dealing with off-brand or no-brand tools, you can still end up with something entirely usable but crappy. The prices usually tell most of the story.