Why does Zorin exist?
Linux Mint exists to be defuckulated Ubuntu, and to show off the Cinnamon desktop which is defuckulated Gnome.
Neon is KDE's in-house distro, because I guess they get to have one even if it is functionally identical to Kubuntu.
Manjaro is Arch that's ready to go out of the box.
What is Zorin for? Do they develop any software, or do they charge money for re-themed Ubuntu Gnome?