Bazzite's sibling Bluefin is specifically meant for developers (the bluefin-dx image) and standard daily driver. Bazzite is targeted more towards gaming and Steam handheld although you can use it as a desktop too.
Also Bazzite has an issue open to make `-dx` images.
It seems both are trying to do it all with a different main focus. Bazzite is Gaming but can do other stuff just as well. Bluefin is Dev but can do others.
I personally find Bazzite more diverse and capable.