The Western Digital WD Blue SN5000 2TB is the objective winner of this comparison, securing four out of six total specification categories. Its most impactful advantage is its sequential write speed, which outperforms the Western Digital WD Blue SA510 500GB by 861 percent. While the smaller drive maintains a lead in MSRP, the significant performance gap in write capabilities establishes the larger drive as the superior technical option for users prioritizing data throughput.

Choose the Western Digital WD Blue SN5000 2TB if your primary requirement is high-speed sequential write performance for demanding workloads. Conversely, the Western Digital WD Blue SA510 500GB is the appropriate selection for budget-conscious buyers who prioritize a lower MSRP over the performance advantages offered by the higher-capacity model. Select the drive that best aligns with your specific balance of cost efficiency and data handling requirements.