The Samsung 990 Pro 1TB and the Western Digital WD Blue SN580 2TB reach an objective tie, as each component leads in three out of seven measured specifications. The most impactful advantage for the Samsung 990 Pro 1TB is its inclusion of a DRAM cache, which represents a 100% improvement over the alternative. Conversely, the Western Digital WD Blue SN580 2TB offers a 100% advantage in total storage capacity, providing double the space for files and applications.

Choose the Samsung 990 Pro 1TB if your primary requirement is the performance benefit provided by a DRAM cache. This component is better suited for users prioritizing technical architecture over raw storage volume. Alternatively, select the Western Digital WD Blue SN580 2TB if your main priority is maximizing available capacity. This drive is the superior choice for users who need to store large amounts of data and prefer double the space over the specific cache advantage.