@Jinbeifan1: The problem is, applying your logic to the planet destroying cannon, Saitama is planet level since he hit it back. You might be saying of course is not since the Earth didn't get destroy, but with the 9 million sq miles statement, no continent were destroy. You could say bc The turtle soak the hit, but that logic would also apply to saitama. Meaning you got a planet buster vs a continent buster, which mean saitama stomps once he get serious. Saitama wins whether hyperbole is use or not. Although since this is in character, saitama just won't one shot right away.
Edit: Actually zebra might win if he use beat punch before he gets serious since saitam is in character and won't go all out right away.
That's because the 10 million sq km's destroyed were already baron when he got there, other than Mount Turtle it wa just a wasteland. But thats not the same as naming the attack. Like I said before, they didn't name the barrage 10 million sq km attack! It was just the general stating how big the attack was, and what followed was a huge ass explosion lol.