Couchbase's Query and Analytics Services both utilize N1QL (SQL for JSON) but are designed for different types of workloads. The Query Service is tailored for applications running the business and managing operational tasks, characterized by a high volume of concurrent, short, and relatively simple queries, similar to OLTP workloads. In contrast, the Analytics Service is better suited for analysis tasks, handling fewer concurrent queries that are longer and more complex, akin to OLAP workloads. While the Query Service operates with short latency and high throughput, the Analytics Service is designed for more extensive data analysis with longer response times. The blog emphasizes that the choice between these services should be based on the specific demands of the workload, comparing various technical aspects such as execution, indexing, and architecture to aid in decision-making.