The article I linked implies that Aurora offers higher write performance:
> If your database workload reaches the Amazon RDS max limit of 80,000 IOPS, and it requires additional IOPS, Aurora PostgreSQL is the preferred database solution. If database workload requires less than 80,000 IOPS, you can choose either Amazon RDS for PostgreSQL or Aurora PostgreSQL based on supported features.
> If your database workload reaches the Amazon RDS max limit of 80,000 IOPS, and it requires additional IOPS, Aurora PostgreSQL is the preferred database solution. If database workload requires less than 80,000 IOPS, you can choose either Amazon RDS for PostgreSQL or Aurora PostgreSQL based on supported features.