The Samsung 990 Pro 4TB is the objective winner of this comparison, securing victory in five out of seven evaluated specifications. Its most significant advantage over the competition is its storage capacity, which is 100% better than the alternative. By offering double the space, this drive provides a substantial increase in total data volume for users who require extensive room for their files and applications compared to the smaller capacity offered by the other model.

The Western Digital WD Black SN770 2TB is the superior choice for budget-conscious buyers, as it holds a 71% advantage in MSRP. Users who prioritize lower initial costs should select this drive for their storage needs. Conversely, the Samsung 990 Pro 4TB is the ideal selection for power users or professionals who require maximum storage capacity and superior technical specifications, justifying the investment for those who need the extra space and performance metrics provided.