The Western Digital WD Black SN8100 2TB is the objective winner of this comparison, securing victory in five out of seven measured specifications. Its most significant technical advantage is its sequential write performance, which is 122% better than the alternative. This substantial lead in write capabilities establishes the drive as the superior option for users prioritizing high-speed data handling and overall technical efficiency across the majority of the evaluated performance metrics.

Users who require maximum sequential write speeds for demanding workloads should choose the Western Digital WD Black SN8100 2TB. Conversely, the Western Digital WD Black SN850X 1TB is the better choice for budget-conscious buyers, as it holds a 71% advantage in MSRP. Selecting between these two components depends on whether your priority is the superior write performance of the larger drive or the cost-effective pricing offered by the smaller model.