The Samsung 9100 Pro 4TB is the objective winner of this comparison, securing victories in five out of seven measured specifications. Its most significant advantage over the alternative is its storage capacity, which is 100% greater than that of the competing drive. By offering double the space for data, the Samsung 9100 Pro 4TB provides a clear technical lead for users requiring extensive storage volume within a single drive configuration.

Users who prioritize maximum storage space should choose the Samsung 9100 Pro 4TB to take advantage of its superior capacity. Conversely, those who prioritize a lower MSRP should select the Samsung 990 Pro 2TB, as it holds a 65% advantage in that specific category. Selecting between these two components depends entirely on whether your primary requirement is the expanded capacity of the larger drive or the cost efficiency offered by the smaller model.