So there's a Japanese Genesis game called Magical Hat. It looks entirely different from the American version of the game. The localization team though the game would be more appealing to American audiences if it was more Halloween themed, which ended up being "Decapattack". As far as I know, both games play in almost the exact same way, but there's some very minor differences in stages that can affect routing, but you can still tell that both games are incredibly simmilar. My question is even if it's a different version of the same game, but has a different look to it, could having small differences in its routing be enough to constitute it as a different game?
Edit: here's an example of what a TAS would look like for this game:
https://youtu.be/N-6iNH-QBz8
And here's Decapattack for comparison:
http://tasvideos.org/1429M.html