Agreed! Just what I wrote as well.
Both work just fine.
My mini-PC is now almost 3 years old and I find the Pi4 is performing better.
But Ubuntu and Kstars work perfectly fine on both systems.
The problems come in with the different flavors of virtual desktops. I still think x11VNC is the simplest solution by far.
Working flawlessly for me for 2 years +.