What functionality does Vari bright add? (Ableton user)

I want to learn more about vari bright. I know the “Obo” device supports it, but I’m wondering what other Ableton devices use it and what extra functionality it could give me (as opposed to mono bright).
You can also just tell me if you know some devices to look into and I can learn more on my own.

Also, somebody showed me a list of all monome ableton devices, but I cant find it now. If anyone knows that link I would appreciate it!