Here are a couple of scenes that compliment each other, and are similar, in many ways. First, both films are in black and white. Next, each film stars (in the case of the former unarguably and in the case of the latter arguably) the best actors of their respective generations. Both films feature boxers. Both movies feature protagonists who are way past their prime. Both films won the Best Actor Oscars for their respective leads. Both scenes have largely the same exact dialogue (you'll see). Both films feature short, chubby and respected character actors as the boxers' brothers. Both films feature blondes as the love interests. Both films are widely regarded as essential tough-guy classics. And both films contain the following undeniably classic scenes. Have you guessed what they are yet?
The first scene is from On the Waterfront (1954) and features Marlon Brando and Rod Steiger and yes, it's the famous back-of-the-cab-I-coulda-been-a-contender scene. The next scene is from Raging Bull (1980) and features Robert DeNiro as real-life washed-up pugilist Jake LaMotta in the prologue/epilogue scene, reciting the I-coulda-been-a-contender speech from On the Waterfront in front of a mirror.
I love these scenes because they show both actors at the very top of their game, giving incredibly naturalistic performances in two of the best films ever made. Enjoy.