Event-driven architectures: when to use a message queue vs a pub/sub system?

Hey everyone, I'm trying to wrap my head around the best practices for event-driven systems. I've seen setups using message queues like RabbitMQ and others using pub/sub with Kafka or even cloud-native solutions like SNS/SQS. What factors influence your decision between a traditional message queue and a pub/sub system? Are there specific scenarios where one is clearly superior to the other? I'm particularly interested in scalability, message ordering guarantees, and handling multiple consumers. Any real-world examples or war stories would be super helpful!