Board Thread:Versus Battles/@comment-28081450-20180410234918/@comment-35166291-20180411015330

Regardless of how much of One For All he can use, he still is inexperienced with it. Shifuto doesn't need to think about using his power, and as such he will never be caught off guard because he wasn't maintaining it. He just IS that strong; Midoriya isn't. He's a fifteen year old kid (granted Shifuto is the same age, but no normal fifteen year old is 9-A). While Midoriya has faced strong opponents, those weren't strictly fights: his battle with Bakugo ended because Uraraka managed to tag the fake nuke, and his fight with All-Might was finished by Midoriya running away. Midoriya won in those instances because his goal was not to beat his opponent; it was to complete a different objective.

Shifuto has enough durability to withstand as many 5-7% One For All attacks as he needs to for the duration of the fight, whereas Midoriya cannot handle those kinds of attacks on a regular basis (though I will admit fighting with his arm and fingers broken like he did against Todoroki was pretty impressive).