That was from 2015. Things have come a long way...
Looks like Brave was released 2016 and it wasn’t chrome. They moved to chromium(open-source google sponsored) 2018.
https://en.wikipedia.org/wiki/Brave_(web_browser)
Nutshell
Chromium gets modified by whoever as needed. So Brave chromium is different than Vivaldi chromium.
https://en.wikipedia.org/wiki/Chromium_(web_browser)