The Western Digital WD Blue SA510 500GB is the objective winner of this comparison, securing more category victories across the evaluated specifications. Its most significant technical advantage is a 195% faster sequential read speed compared to the alternative. While the Seagate Barracuda 2TB falls behind in the overall spec count, it remains a viable option for specific storage requirements due to its 300% greater capacity, which stands as its primary advantage over the smaller drive.

Choose the Western Digital WD Blue SA510 500GB if your priority is high-speed data access and improved responsiveness for your system operations. Conversely, select the Seagate Barracuda 2TB if your primary goal is maximizing total storage space for large files and extensive data libraries. The decision depends entirely on whether you require the superior read performance of the former or the significantly larger capacity offered by the latter.