https://distrowatch.com/weekly.php?issue=20201207#popos
I found this article by Jesse Smith, comparing the two Distros, which both use Gnome, to be very interesting.
Apparently Jesse found that PopOS was much faster in operation, than Ubuntu.
Saw that. Interesting comparison. I have tried PopOS before. It does seem faster, especially at booting on an older Mac. However, I didn't like its update manager as much as Ubuntu's, and I much prefer Ubuntu aesthetically. Ubuntu is fast enough for me on any of the computers I use it on.
The auto-tiling feature looks impressive. I watched the video on the System 76 website that shows it off.