TiDB and ClickHouse are designed for different use cases - TiDB is suitable for hybrid transactional-analytical processing with MySQL compatibility, while ClickHouse excels at high-speed analytical processing with native vector search capabilities. The choice between the two ultimately depends on your specific needs, including data size, query patterns, performance requirements, and existing infrastructure. Thorough benchmarking with your own datasets and query patterns is key to making an informed decision. Additionally, tools like VectorDBBench can help evaluate and compare different vector database systems, providing a more accurate assessment of their performance and suitability for specific use cases.