Okay, looks like the Cube is the only choice for me then.
If you have one, can you do a quick test for me? Before I pull the trigger again 🙂
I drew a wave about 2cm high in OneNote 2016 with the Chuwi Hi12 and an HP 2740p and then enlarged them.
The top image is of the Chuwi, the bottom of the HP with Wacom.

Can you draw a similar wave on the Cube and let me know what the result is? Does it look as smooth as the HP? I expect it too, but I just want to be sure.
Thanks again.