The Seagate Barracuda 2TB and the Western Digital WD Black SN850X 1TB result in an objective tie across the evaluated specifications. While both drives offer distinct strengths, the Seagate Barracuda 2TB provides the most significant capacity advantage, offering 100% more storage space than its competitor. Conversely, the Western Digital WD Black SN850X 1TB delivers a massive performance lead, featuring a sequential read speed that is 3742% better than the Seagate drive.

Choose the Seagate Barracuda 2TB if your primary requirement is maximizing total storage volume for large file libraries. Select the Western Digital WD Black SN850X 1TB if your priority is high-speed data access and superior sequential read performance. The decision depends entirely on whether you value the ability to store twice as much data or the ability to read that data significantly faster.