So, I have a Magisk-less root now. See:
https://www.mobileread.com/forums/sh...d.php?t=346096. The device is 90% there. That means that I can read my book, use my clicker and can't tell that I'm not on my Poke5.
OTOH, I find that I can get a system crash (900e) easier than I ever did with the Poke5. This needs some investigating.
Comparing screens is very difficult since Onyx plays with contrast, brightness, gamma and fonts. You have to put a slash through the "master switch" in the Eink center. But it is my impression that the Go6 has blacker blacks than the the Poke5.