Oh I would never use bluetooth on PC, that adds input latency like crazy. I was talking wireless only ever over 2.4Ghz with the 8bitdo adapter. Even there the KK2 had really bad latency while all the others were fine. The KK3 Max actually comes with its own adapter to achieve 1000Hz wirelessly (I got only around 880, but still higher than all the others on stock which are usually stuck on 250 or 500Hz. You can overclock the PS5 to 1000 when wired but I never did).
Also since you mentioned them going for an elite controller style with the KK3 Max, I wouldn’t count on its back pedals. Personally I find they make it impossible to hold the controller. I’ve never liked the back pedals on the Xbox Elite, and I like them even less on the KK3, while I found the one on the 8bitdo ultimate really nice (though I never used them anyway).
As for the branding I have no clue. They did have a US/Target version of the KK2 Pro called the Zen Pro which was the exact same controller, just sold at Target. I think they’re just weird with their naming.
On that note, I’ve also heard there is supposed to be more budget versions of the KK3 Max coming out over the year (I think it was two more), similar to how they had a KK2 and KK2 Pro.
what about Haribo