The Seagate Barracuda 8TB and the Western Digital WD Black SN8100 2TB represent a tie in this objective comparison, as each component leads in two out of five measured specifications. The Seagate Barracuda 8TB offers the most significant advantage in terms of capacity, providing 300% more storage space than its competitor. Conversely, the Western Digital WD Black SN8100 2TB delivers a massive performance lead, boasting a sequential read speed that is 7742% better than the alternative.

Users who prioritize massive data storage for large libraries or archival purposes should choose the Seagate Barracuda 8TB for its superior capacity. Those who require high-speed data access and prioritize rapid sequential read performance should select the Western Digital WD Black SN8100 2TB instead. Your final decision depends entirely on whether your specific workflow demands the expansive volume of the Seagate drive or the extreme speed advantages offered by the Western Digital model.