In theory because Ubuntu and Raspberry OS are both Debian based, you should be able to use both versions of the Snakeoil installer on both platforms. That's the theory anyway.
I'm also trying to source a second hand ZIMA single board computer (SBC). Hope that will work out.
All in all I hope the new install method will make it easier for people to try Snakeoil OS. Quit frankly we are living in a shitty world right now so a little bit of good music will brighten the day for some.