[deleted] Imho,
1) I subjectively like the Pop GTK & Shell theme a lot, but I'm one of those freaks who thought Karmic Koala was the most beautiful Ubuntu. I dig brown and orange, and I do apologize.
2) Pop adds a few gaming related pieces of software to their repo that's a bit less work for me out of the box.
3) Pop doesn't use the Ubuntu Dock/Dash-to-Dock by default, which sadly still doesn't work well with touchscreens. And unlike Solus GNOME which defaults to Dash-to-Dock, but includes Gnome Tweaks out of the box so it's easily deactivated, default Ubuntu requires users to install a whole new session to get rid of their dock, which is easily one of the most absurd UX design choices in the history of computing.
4) Notwithstanding #3, I like Ubuntu well enough that Pop's foundation won't unnecessarily irritate me with arbitrary limits, like how Fedora used to make me install a package after install just to get subpixely fonts! !! !!!
5) Pop's two iso deal with the nvidia and intel versions is cool I guess.
6) Pop's Kernelstub is easy to use for adding kernel parameters to make hardware like brightness control and fans behave on laptops, etc.
All this being said, I'd never switch from Solus. I treat this thread's question like a doomsday scenario question. If Solus ever died, I might not use computers anymore.