How are the endings similar?

Act 1 ends with 3rd Juror reacts violently to this, calling it dishonest, saying that this kid had “got to burn.” 8th Juror calls him a “self-appointed public avenger” and a “sadist,” and 3rd leaps at him. Restrained by the other men, he shouts, “God damn it! I’ll kill him! I’ll kill him.” 8th Juror asks, “You don’t really mean you’ll kill me, do you?” proving his earlier point about how people say, “I’ll kill you,” when they don’t really mean it.

Third juror is also the focal point. Now, the vote is 11 to 1, and 3rd Juror stands alone. At first, he stands firm, saying that he will be the holdout to make this a hung jury. He launches himself into a final massive rant against the boy that descends into nonsense. 8th and 4th Jurors make a short final plea, and 3rd Juror finally concedes, saying “All right. Not guilty.” The Foreman informs the Guard that they have reached a verdict, and the Jurors leave the courtroom.