Mewtwo and Sephiroth are not really comparable outside of their weight stat and the fact that so many people are doing so proves that they have not played either character enough. Mewtwo is a projectile zoner with better shield pressure, better CQC frame data, a better combo game, better OOS game, better grab game at high percents, and better parry punishes. In comparison, sephiroth is a character with ridiculous non commital mid range game, better jump ins, a much better disadvantage, an absurd comeback mechanic, busted edge guarding, and better grab follow ups. They both also have excellent ledge trapping.

Mewtwo’s disadvantage state is very bad, but it is honestly not near as terrible as people here say. Mewtwo has the option to drift to ledge a lot of the time, and while he doesn’t have answers to a lot of the absolute best ledge pressure, he has some mixups between sharking, teleporting and the standard options. His ledge getup is also very long, which can fuck people up.