I´m sure others have noticed it too, but what the hell. I love how in the first two verses, where Em still wonders why he´s so different to the rest, his voice has a little ¨distortion¨ effect, like it is not crystal clear, maybe symbolizing how clouded and foggy his future seemed at this point in his life. Then the 3rd verse starts and his voice sounds very clear, and he says ¨Now I think the fact that I'm differently wired's awesome¨, since he finally realized what his path was, therefore no more fog around him.
One of the reasons why I love this song so much.