difference between 'generic' and 'genericcloud'

[David L. Willson]

I am trying to understand the difference between 'generic' and 'genericcloud' 
in these images. 
https://cloud.debian.org/images/cloud/bookworm/20250115-1993/ 
I read this page a few times 
https://cloud.debian.org/images/cloud/ 
... but I see nothing obvious.