I will say, I prefer Bazzite for dev too.

In general Project Bluefin is newer, but seems to be trying to get into gaming too.

Likewise, Bazzite is considering developer images also. So I might switch to those.

But it's so easy to switch. I currently use Bazzite + Nix + HomeManager + Flatpaks and it has been fantastic. I only layer Tailscale and a few minor things that need be system level to operate right.