Is there any metric here by which you could judge one of the results as better than the others?
Shane is one of the masters: https://www.shadertoy.com/user/Shane
And of course Inigo Quilez, the site's creator: https://www.shadertoy.com/user/iq
Leaving aside copyrights/licenses/etc, are her creations "exportable" to be used in videogames, films CGI, VFX, etc? For example, this Abstract Corridor (https://www.shadertoy.com/view/MlXSWX), could be used in a videogame just with that piece of code (I think it's C or a variant of it).
It's incredible for me that such piece of art is done only by code - if asked, I would have said that it uses assets and more.
[0] https://yandex.com/images/search?rpt=imageview&url=https%3A%...
This is a really interesting project, thanks for showing it to us!
[1] https://apps.apple.com/us/app/deko-beautiful-wallpapers/id58...