Jon feels a bit different too. He does not realize that he has been effected by the differences in this reality. Since his Dad was now the more feminine one in the relationship and he had identified more with his father, Jon also grew up a bit more feminine.
His room was now filled with romance novels and chick flicks, and fashion magazines. In this reality he was also not as close with Karyn, instead having more feminine female friends. He had an even bigger crush on Karyn because now he felt drawn to her tomboyish nature even more.