Well technically Zoro post power up DID ONE SHOT Mr1.
Because Mr1 was 100% or at best 90% when Zoro got a power up.
But once Zoro got a power up, Mr1 is done.
So if Zoro started a fight with fresh Mr1 after learning Shi Shi Son Son, he would win low diff.
Tell me if I am wrong here
@Cinera