I believe they're coming from the same prototype, it's just that the first video obviously had access before the show started or right after it ended for the press. The debug is probably an aftereffect from accessing the level select. The life counter is missing because of the debug stuff being enabled in the first place.

The ballhog seems to have similar behavior to crabmeat - they just walk back and forth very slowly and probably throw things in front of sonic as they walk beneath them. 

Pretty interesting that there's an eggman monitor and a static monitor as well.  

I have more stuff for Sonic 1 as well, but hopefully one day it can be put to use. :)