Final answer:
Concurring opinions are written by justices who agree with the majority but for different reasons, while dissenting opinions are written by justices who disagree with the majority. Concurring opinions originate in appellate courts and dissenting opinions can originate in any court, including the Supreme Court.
Step-by-step explanation:
Concurring opinions are written by justices who agree with the majority decision, but for different reasons or on different legal grounds. These opinions originate in appellate courts. On the other hand, dissenting opinions are written by justices who disagree with the majority decision. These opinions can originate in any court, including the Supreme Court.