The Western Digital WD Black SN850X 4TB is the objective winner of this comparison, securing more individual specification victories than its competitor. While the SK Hynix Platinum P41 2TB holds a significant advantage in MSRP, which is 66% better, the Western Digital WD Black SN850X 4TB provides the most impactful benefit by offering 100% more storage capacity. This substantial difference in total space makes the Western Digital drive the superior choice for users prioritizing maximum data volume.

Choose the Western Digital WD Black SN850X 4TB if your primary requirement is high-capacity storage for large libraries or extensive file management. Conversely, select the SK Hynix Platinum P41 2TB if your budget is the most critical factor in your decision, as it offers a more favorable MSRP. Both drives perform competitively in other areas, but your final choice should depend on whether you value doubling your available storage or minimizing your initial expenditure.