There’s two models - the Duet 3 which comes with a Snapdragon 7c Gen 2 @ 2.55 GHz CPU, and the 3i which comes with a Intel Celeron N4020. I would rather use the Duet 3, due to the cover, and since I am already familiar with the feel of the device due to having owned a Surface Pro 4, but I’d like to choose whichever works best for running Linux.
Edit: Just for additional information I’ll be using it as a note-taking tablet with xournal++, not for any heavy tasks
Xournal++ supports other architectures. They might not have compiled binaries for other architectures ready to be downloaded on their GitHub release, but it’s packaged on at least postmarketOS (i.e. Alpine Linux) edge (I have it on my “Chromebook”) and Debian Stable.