The difference between a traditional data warehouse and a data lake is that data warehouses are designed to store structured, predefined data for business intelligence and reporting, while data lakes store raw data in its various forms without needing to structure it upfront. A Databricks Data Lakehouse, on the other hand, combines the best features of both approaches by storing raw and processed data in a unified environment, providing flexibility and scalability while maintaining data quality and consistency. This hybrid architecture allows organizations to handle both structured and unstructured data efficiently, making it suitable for businesses that require both traditional BI use cases and advanced analytics like machine learning.