The Western Digital WD Black SN8100 2TB is the objective winner, securing victories in six out of seven comparable specifications. Its most significant technical advantage is a sequential write speed that is 233% better than the competition. While the Silicon Power UD90 1TB falls behind in most performance metrics, it remains a viable alternative for budget-conscious builders, offering an MSRP that is 84% better than the higher-performing drive.

Choose the Western Digital WD Black SN8100 2TB if your primary requirement is high-speed sequential write performance for demanding workloads. Conversely, the Silicon Power UD90 1TB is the logical selection for users who prioritize a lower MSRP over raw speed. By selecting the Silicon Power UD90 1TB, you sacrifice significant write capabilities to achieve a more favorable entry cost, whereas the Western Digital WD Black SN8100 2TB provides superior technical specifications for power users.