Boy clothes hide more. & they're more natural lookin like what most girls wear maybe (idrk) so it stands out less. Or maybe the sweaters hide certain "give away" features. Like my ginormous hands lol. Sweater would hide an Adam's apple easier too, that kinda stuff.
I envy u tho. I dont pass as well unless i show a lot of skin... shorts, small t-shirts, tanktops. The more skin i show, the less problems i have. But i also work out daily, so this body actually shuts ppl up, lol, no matter How ginormous my hands are.
But im sure my giant head/forehead doesnt help to keep people from clocking me, lol.
Just like a cis girl, u Gotta work with what worx best for you. Certain clothes & looks will be better you than others would. I just recently got into leggings, i might never wear denim again, lol. They're Much more flattering, much lower chance of being clocked.