Hello,
I notice that both offer 2 downloads, see here and here - a .tar.gz and an .img.xz.
The installation instructions only mention the .tar.gz as a zipped filesystem I guess.

What is the .img.xz image for? It unzips to an .img file.
Can this be flashed to the device directly?
How? I tried the Devuan version with flasher, but IIRC it complained about the file being incompatible.
I am a little reluctant to try again now beause I'm in the middle of the long & weary process to install Maemo Leste through Ubiboot.
So I thought I'd ask instead.