The Samsung 9100 Pro 4TB is the objective winner of this comparison, securing victories in five out of seven evaluated specifications. Its most significant advantage is its storage capacity, which is 300% greater than that of the alternative. By offering substantially more room for data, the Samsung 9100 Pro 4TB provides a clear technical lead for users requiring high-density storage solutions compared to the lower-capacity model.

Choose the Samsung 9100 Pro 4TB if your primary requirement is maximum storage space for large files or extensive libraries. Conversely, the Samsung 990 EVO Plus 1TB is the better option for budget-conscious buyers, as it holds a 77% advantage in MSRP. Select the latter if you prioritize a lower initial cost over the expansive capacity offered by the larger drive.