<human>: What are the differences between a symphony and an oratorio?
<bot>: The main difference between a symphony and an oratorio is in the form. A symphony is typically written for orchestra, with a full complement of instruments, while an oratorio is composed for solo voice(s) and a small instrumental ensemble. Additionally, a symphony tends to have more complex structure than an oratorio, often including movements such as slow introductions, fast-paced scherzi, and dramatic climaxes. An oratorio's structure can vary from one composer to another but generally follows a similar pattern.