>>1775trans men, after years of testosterone and top surgery, tend to have a MUCH larger (and more sensitive) clitoris, no tits (obviously) a deeper voice, facial hair growth, they likely have different hair styles in general, they have different fat structures due to fat redistribution from HRT, etc etc etc.
tl;dr boys with vaginas have literally altered their body chemistry to be more masculine, and their body changes to match it.
side note: i also prefer boys with vaginas. t-dicks are literally the best.