I actually have this twin au in my head:
Jack and his twin brother Sean, they both have green hair but Sean kept his gages in and has tattoos all over his neck. Their parents died when they were young in an accident and they were raised by the doctor schneep who took care of them when they were in the hospital
Mark and his twin brother Damien, aside from Damien being a far sharper dresser than Mark there isn’t much physically different about the two except for the fact that enzyme problem skipped Damien and he can drink all he damn well pleases.
and a special edition not always included in these:
Danny and his twin brother Aden, Danny has glasses and a Celtic tri-force tattoo on his hip and tends to wear cozy clothes vs his showy musician brother who always wears slight eyeliner, leather jackets tight pants and flirts with anything that walks