The Samsung 990 Pro 1TB is the objective winner of this comparison, securing a lead in three out of seven measured specifications. Its most impactful advantage is a 38% improvement in sequential write performance compared to the Samsung 980 Pro 1TB. While both drives share identical ratings in four categories, the superior write capabilities of the newer model establish it as the more capable hardware option for high-performance storage tasks.

Users who prioritize maximum sequential write speeds for data-intensive workloads should select the Samsung 990 Pro 1TB to leverage its significant performance lead. Conversely, those who do not require this specific speed advantage may find the Samsung 980 Pro 1TB sufficient for their needs, as it matches the newer drive in four of the seven evaluated specifications. Choosing between these components depends entirely on whether your specific use case benefits from the increased write throughput.