Played the Master System version after beating the Genesis one. This one is interesting. I think the Genesis version is ultimately the better of the two, and enemies get harder and more aggressive near the end of the game comparatively, but it's still a fun time. Bonus points for including the Bonus Stages from the Arcade port which the Genesis version doesn't even have.

By the way, no clue why this version isn't listed separately. Despite the gameplay being similar, it might as well be a different game considering it has unique levels, enemies, and level layouts compared to the Genesis release, as well as not even having Co-Op.