Poli and Marrone are both 22 , but the first has much more experience than the second
It could turn out to be a good move . Poli has 71 apperances in serie a and 32 in serie b , he could be more ready than marrone to play imediatly since he has more experience and i think he can also afford to stay in bench one year . On the other hand marrone has only 5 apperances with juve and 18 in b with siena so he definetly needs to get playing time this year , he simply can't be on the bench another year . At juve he will be vice-pirlo so unless pirlo get's injured we will rarely see him on the pitch . I say he would get around 15 matches in serie a + coppa , if he went to fiorentina he will easily get 30+ matches if he doesn't get injured .