Nowadays they have the same meaning, an attorney is usually the one that represents you in court, and a lawyer is one that practices law in general. There was a difference in the past. Trial = pre-court hearing( 1st day at court) to determine outcome(if case goes to court) judgment = judge's decision of the case.

In the United States in ordinary use, they are synonyms. However, "attorney" is more formal and more respectful. If I were telling someone about my late classmate John F., I would describe him as "a lawyer," but if if he were giving a speech and I was introducing him, I would call him "an attorney." It is much like the difference between "doctor" and "physician."