The Crucial T705 4TB with Heatsink is the objective winner of this comparison, securing more spec victories than its competitor. Its most significant advantage is a 93% improvement in sequential read performance, which provides a substantial lead in data transfer capabilities. While both drives offer identical storage capacity, the superior speed of this model establishes it as the more powerful hardware option for users prioritizing raw data throughput in their storage configuration.

Choose the Crucial T705 4TB with Heatsink if your primary requirement is maximizing sequential read speeds for high-performance tasks. Conversely, the Western Digital WD Black SN850X 4TB is the better choice for budget-conscious buyers, as it holds a 44% advantage in MSRP. Selecting between these two drives depends entirely on whether you prioritize the significant speed gains offered by the former or the cost efficiency provided by the latter.