You know all those movies where the bad guy looks at the good guy and says, “we’re not so different, you and I?” That concept is the poignant, underlying theme of “Donnie Brasco” (1997). Johnny Depp is the young, family man, undercover FBI agent and Al Pacino is the world-weary mob wiseguy, but they’re not so different. They’re both mid-level grinders, bound together, trying to do their best while their bosses take advantage of them. The allure of being someone he’s not has Depp turning away from his own life of quiet desperation, but is the alternative that different? Fuggedaboutit.