The Samsung 990 Pro 4TB is the objective winner of this comparison, securing more individual specification victories than its counterpart. While both drives share identical performance characteristics across the majority of tested fields, the 4TB model provides a significant advantage in storage capacity, which is 300% greater than that of the smaller drive. This makes the larger capacity the most impactful differentiator between these two storage solutions.

Users prioritizing budget efficiency should select the Samsung 990 Pro 1TB, as it offers a 68% advantage in MSRP compared to the higher-capacity model. Conversely, those who require extensive space for large datasets or media libraries should opt for the 4TB version to leverage its superior capacity. Choosing between these two components depends entirely on whether your primary requirement is a lower initial cost or the ability to store significantly more data.