The Western Digital WD Black SN8100 4TB is the objective winner of this comparison, securing three out of five total specification categories. Its most significant advantage over the Seagate Barracuda 2TB is its sequential read speed, which is 7742% higher. While the Seagate Barracuda 2TB maintains a lead in MSRP, offering a 90% advantage in that specific metric, the superior performance capabilities of the Western Digital WD Black SN8100 4TB make it the more capable hardware choice overall.

Users prioritizing maximum storage performance should select the Western Digital WD Black SN8100 4TB to leverage its massive lead in sequential read speeds. Conversely, the Seagate Barracuda 2TB is the appropriate choice for budget-conscious buyers who prioritize a lower MSRP over high-speed data access. By evaluating these specific advantages, you can align your purchase with either a need for high-performance data throughput or a strict focus on initial acquisition costs.