Despite what some might think William is the older twin and he came into this world a lot easier than this brother. Dean followed behind Will by 10 minutes nearly suffocating to death. It was clear when the two twins were born that Dean was the bigger twin weighing just slightly more than his older brother. As they grew, Dean seemed to have growth spurts that Will never saw. Dean was taller, Rougher, louder. Which led to Dean giving William the nickname 'Runt'. As they got older and grew into men Dean got more muscular, was more involved in sports and being more athletic and Will has always been more lean and slender. He spent his time Reading, writing, and studying art. Dean tended to have longer hair that he'll put in a small bun and a beard where William would have medium length hair and a clean shaven face.
Today that is pretty much the same except Will has started to let his facial hair grow out (per the request of Jordan). Wills Style has Academia vibes, he is a teacher and yes his students tease him about his style, but he doesn't care hes comfortable in what he wears and he's not changing who he is now. When it's just Him and Jordan at home he's usually in boxers and t-shirts. He doesn't have any tattoos.
Dean's look is a bit more casual, he doesn't take himself too seriously and is just taking things one day at a time. He doesn't buy a lot of new clothes and he's stubborn about it so a lot of his things are hanging on by a thread. When he's at home he's usually in a tank top and sweats. He really is a chill guy just a little rough around the edges. He is COVERED in tattoos, all from different times in his life.
Both men have let their hair go fully gray.