It's the length.
The BR100 is the standard square, the BR200 is the shorter (consumer-grade) one.
It'll still work but it won't go to the edge of the square.
Then I bet you are still looking.
Kings have leaked.
https://mayorsmanor.com/2019/11/update-la-kings-2020-outdoor-jersey-leak/
http://news.sportslogos.net/2019/11/22/leaked-2020-la-kings-stadium-series-jersey/