The Samsung 9100 Pro 2TB is the objective winner of this comparison, securing victories in four out of seven evaluated specifications. Its most significant advantage is its sequential write performance, which is 103% better than the alternative. By outperforming in the majority of categories, this drive establishes itself as the superior option for users prioritizing raw technical specifications and write-heavy tasks over total storage volume.

Choose the Samsung 9100 Pro 2TB if your primary requirement is high-speed sequential write performance for demanding professional workflows. Conversely, select the Western Digital WD Black SN850X 4TB if your priority is storage space, as it offers a 100% capacity advantage over the competitor. This makes the Western Digital drive the better choice for users who need to house large libraries of data rather than maximizing individual write speeds.