As a Brave user both on desktop and mobile, Kiwi looks pretty dope at a first glance.
On mobile, the most important feature of Brave is the ability to play youtube videos in background. (even with the display turned off) Can Kiwi do that too? If yes, it may actually be superior to Brave.
Brbave does offer some nice features (ad blocking, media in background etc.) but they also push shit I don't want for myself and don't like that they engage in them. (like shitcoin wallets) And it has a history of shady things. (like autofilling affiliate links without telling the user)
If Kiwi has a clean slate, does care about my privacy at least as much as Brave does and allows me to turn off the display on Youtube, I am instantly in.