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Project Bluefin: A Linux Desktop for Serious Developers
(thenewstack.io)
From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0
I checked the github page you link and can find no differences listed, just three bullet points that appear to have be written by a PR team. You say an Ubuntu Desktop experience melded with Fedora Silverblue. Don't you mean GNOME? Ubuntu isn't a desktop environment, it's a Linux distro. GNOME is the desktop environment. That seems like an embarassing blunder in your copy when you claim to be building a distro for "serious" developers.
If it weren't open source, I'd think this was a scam. Weird choice.
IIRC, Bluefin uses the GNOME extensions that Ubuntu uses - so yes, GNOME in the same way that the current version of Pop!_OS is GNOME + their own extensions.