The Western Digital WD Black SN850X 2TB is the objective winner of this comparison, securing five out of seven total specification categories. Its most significant advantage over the competition is its storage capacity, which is 100% better than the alternative. While the Western Digital WD Black SN770 1TB remains a viable option, it only leads in one category, with its primary strength being a 61% better MSRP compared to the higher-capacity model.

Choose the Western Digital WD Black SN850X 2TB if your primary requirement is maximum storage space for your system. Conversely, the Western Digital WD Black SN770 1TB is the better selection for users who prioritize a lower MSRP above all other considerations. By evaluating these specific advantages in capacity and cost, you can determine which drive aligns best with your individual storage needs and budget constraints.