The Western Digital WD Black SN8100 4TB is the objective winner of this comparison, securing more individual specification victories than its competitor. While the Seagate FireCuda 540 2TB holds a notable advantage in MSRP, which is 53% better than the alternative, the Western Digital WD Black SN8100 4TB provides the most impactful benefit. Its primary strength is its storage capacity, which is 100% better than the capacity offered by the Seagate FireCuda 540 2TB.

Users who prioritize maximum storage space for large libraries or extensive file collections should choose the Western Digital WD Black SN8100 4TB to take advantage of its superior capacity. Conversely, the Seagate FireCuda 540 2TB is the better option for budget-conscious buyers who want to minimize their initial expenditure. Selecting between these two drives depends entirely on whether your primary requirement is a lower cost or a significantly larger volume of available storage.