If the data is manageable in both systems, relational databases (RDBMS) are generally the better choice because they provide:

• Strong ACID compliance → ensures consistency and reliability.

• Complex queries and reporting → joins, aggregations, and analytics are much easier.

• Mature tooling → backup, recovery, and monitoring are well-supported.

Non-relational (NoSQL) databases shine primarily when you need:

• Massive horizontal scaling across multiple nodes.

• High write throughput or very flexible/unstructured schema.

So, for datasets that both systems can handle comfortably, RDBMS is usually preferable unless your access patterns or scalability needs strongly favor NoSQL.