Honest take:

Those demos have soul. The AI versions don't.

They succeed in some ways at capturing the human emotion in the demo, and fall flat in other ways.

  - The lyrics capture
  - The melody captures
  - The production is too polished
  - The voice doesn't have the same emotion at all

It's not any worse than a human cover by a skilled but uninspiring human artist.

Depending on how you evaluate, it's either amazing it gets this far, or not impressive at all. :-)

I'd add the demos to my playlist, I wouldn't add the others. (I'm not against AIs in general.)