Observers and data miners have identified several "exclusive" quirks in these prerelease builds that were changed for the final September 1996 North American launch:
Had a more "cartoony" appearance with scarier faces on the Whomps. Audio & Animation: King Bob-omb super mario 64 e3 1996 rom exclusive
Another notable community project focusing on the pre-E3 1996 aesthetics and physics. specific assets super mario 64 e3 1996 rom exclusive