The Western Digital WD Black SN8100 4TB is the objective winner of this comparison, securing three out of five total specification categories. Its most impactful advantage is a 7742% improvement in sequential read performance compared to the Seagate Barracuda 1TB. While the latter holds a lead in one category, the former dominates the majority of the technical specifications provided, establishing itself as the superior option for users prioritizing raw data throughput and increased storage capacity.

Choose the Western Digital WD Black SN8100 4TB if your primary requirement is high-speed sequential read performance and a larger 4TB capacity. Conversely, the Seagate Barracuda 1TB is the appropriate selection for budget-conscious users, as it offers a 93% advantage in MSRP. Select the Seagate Barracuda 1TB if your storage needs are modest and minimizing initial expenditure is your primary goal, whereas the Western Digital WD Black SN8100 4TB is better suited for performance-oriented tasks.