The Western Digital WD Blue SN5000 4TB is the objective winner of this comparison, securing four out of six total specification categories. Its most impactful advantage is its sequential read speed, which outperforms the Western Digital WD Blue SA510 2TB by 882 percent. While the latter drive maintains a lead in MSRP, the former provides a significantly more robust technical foundation for data-intensive tasks through its superior read performance and expanded capacity.

Users prioritizing maximum storage space and high-speed data access should select the Western Digital WD Blue SN5000 4TB for their system builds. Conversely, the Western Digital WD Blue SA510 2TB remains the appropriate choice for budget-conscious buyers who prioritize a lower MSRP over the performance and capacity gains offered by the alternative. Each drive serves a distinct segment based on whether the user values initial acquisition cost or raw sequential read capabilities.