lol...well jiraya's a perv and he's a senin.......omg! kakashi will b the next senin!


anyway, if u want some tangible difference (does that make sense?), it seems all he chuunins wear that ninja uniform, here as almost all jounins have thier own unique clothes.......gai has that green thing, kurnie has that dress, kakashi has the mask, hizashi has his robe, asuma has.....um, something......his ciggerate i guess.