I’m looking at the ugee and it seems to be at the same price point as the xp-pen drawing pad, both seem to be 8gb ram and I have no idea about processors. (both are 429usd at the moment and claim 499 as regular price)
The difference as I see it is the pen and the size.
Based o the charging port on the ugee pen, and it’s not the regular display-tablet technology, I would think it’s less ideal. Not having tried it, I think the xp-pen is a nicer drawing experience. And charging pens is annoying, they always run empty just when inspiration hits 
But 14" screen is nice.
The 11" on the magic notepad bothered me untill I realized I could konfigure Krita in a way that makes the dockers unecessary (by using gestures), and I can utilize all of the screen. Before that I personally would have opted for the larger screen but now I’m not so sure.
Can you find any video reviews for both tablets and see if that helps you decide?
Is the tilt something you utilize a lot? Is it reliable on the ugee? (Both say they have it, but it is a weakness in xp-pen). Is the ugee giving straight or wobbly diagonal lines - and is it something that’s important to you?
Sorry if I’m not helpful, just trying to help you bounce ideas.
(charging and opening the notepad to remind myself of how it works. I realize the pen only have one button, I remembered it to have two)
Edit:
Revived my xp-pen notepad, and a few things to know with Krita; the menues and pop-up palette is annoyingly large. I don’t know if that’s the same with the drawing pad. I assume it’s due to the screen resolution.
The pen has one button, I set it to color pick. I have twofinger tap to bring out the pop-up menue, three finger to undo and one finger drag to change brush size. I couldn’t find if I had anything to toggle eraser, but I kept the eraser available in the top menue. I put one finger tap to nothing as it helps with palm rejection and accidentally undoing stuff. (I do prefer to have more buttons on the pen though)
I’ve also configured the top bar to just keep the tools I use frequently.
A larger screen would indeed be nice still. Especially because the toolbar and pop-up is so large (I have it on the smallest setting).
As for android that works well with Krita; I think any android tablet with a good pen, screen and specs will work with Krita. If it handles the other programs like clip in a review, it probably works with Krita just as well. And you can configure Krita to suit your needs. So you need to know what to sacrifice in budget-pen-display-capacity in the tablet.
My notepad only has 6gb Ram, it opens Krita a bit slow but once open it works fine. Large brushes does lag.
Watching ugee reviews - the palm rejection seems a con (but changing the one finger tap to nothing might help),the pen seems to work well for the reviewers, so perhaps it is the one you should go for. The screen size does seem like a good argument for it too.
I haven’t tried it though, so I can only share my experience with the xp-pen.
Screenshot from my xp-pen magic notepad and how Krita looks. (just a very quick test sketch)
