Nice! That’s good to know.
I have the 8bitdo ultimate one with the Hall effect joysticks. The KK2 was not available when I bought it.
The 8bitdo works well, except that the screenshot button doesn’t work on steam while using the dongle (but it works when paired as a switch controller, lol). Maybe I should check firmware again to see if they changed that. It seems the controller presents itself as an Xbox controller (the version without the share button)
From my experience, the 8bitdo Ultimate has been great. (KingKong 2 was not available when I purchased it)
I have it connected with the dongle to my PC (or Steam Deck depending) and when I want to play on PC I switch the button on the back to use the dongle. And when I want to play on the Switch, I change the toggle on the back again, and it stays paired to the Switch.
I don’t know enough about how KK2 pairs. Maybe it can do this too, not sure. I like that the charging stand allows you to keep the dongle in there and it connects to the pc through the charger.
And also, previous 8bitdo controllers have lasted me a long time.
Let us know what makes you pick one over the other. And happy gaming.