The Western Digital WD Black SN8100 4TB is the objective winner of this comparison, securing five out of seven total specification categories. Its most significant performance advantage is its sequential write speed, which outperforms the alternative by 115 percent. While the SK Hynix Platinum P41 2TB remains competitive in one specific area and ties in another, it falls behind the overall technical capabilities demonstrated by the Western Digital drive across the majority of the measured metrics.

Users who prioritize maximum storage capacity and superior sequential write performance should choose the Western Digital WD Black SN8100 4TB for their system. Conversely, the SK Hynix Platinum P41 2TB is the better option for budget-conscious buyers, as it holds a 76 percent advantage in MSRP. Selecting between these two drives depends on whether your primary requirement is the high-end write throughput of the larger drive or the cost efficiency offered by the smaller capacity model.