Another case of "not necessarily better, but different," Terminator 2: Judgment Day is almost like the Aliens of the original John Connor trilogy, which is funny considering James Cameron's involvement with both films. He takes his first, more suspenseful film and reinvents it as almost pure action, while still preserving the same tone and overall feel.
What makes the film particularly memorable is that this sequel takes the villain from the first movie and makes him the hero, but does so in a way that works within the property's mythology. Sure, the general conceit is the same, but the amount of one-liners and memorable moments in T2 make it the film that most will look to when they think of the Terminator franchise. After all, who hasn't said, "I'll be back," at least once or twice in their life?