The Western Digital WD Blue SN580 1TB is the objective winner of this comparison, securing victories in four out of six measured specifications. Its most impactful advantage is a 714% higher sequential write speed compared to the alternative. While the Western Digital WD Blue SA510 500GB holds a 27% advantage in MSRP, it falls behind in the majority of performance-related metrics, making the SN580 the superior choice for users prioritizing data transfer capabilities and overall storage capacity.

Users who require high-speed sequential write performance for demanding tasks should choose the Western Digital WD Blue SN580 1TB, as it significantly outperforms the competition in this area. Conversely, the Western Digital WD Blue SA510 500GB is the better option for budget-conscious buyers who prioritize a lower MSRP over raw speed and storage volume. Select the former for performance-heavy workloads or the latter if minimizing initial expenditure is your primary goal.