Gutts doesn't become super spry physcially but mentally he thinks he has become super spry.The armor throws hate and corruption into his mind and helps him push himself to keep going along with the fact that if he simply can't fall. He feels invincible and because of the armor mind fucking him "HE KNOWS" (but really he thinks) he's invincible.
So the armor doesn't physically make him stronger or hinder the amount of pain he can feel. It simply makes him not give two shits about pain.
So the armor doesn't physically make him stronger or hinder the amount of pain he can feel. It simply makes him not give two shits about pain.