The Western Digital WD Black SN770 2TB and the Western Digital WD Black SN850X 1TB with Heatsink represent an objective tie across the evaluated specifications. While both drives offer distinct technical strengths, the most impactful advantage for the former is its capacity, which is 100% better than the latter. Conversely, the latter provides a 100% advantage in DRAM cache, marking a significant architectural difference between these two storage solutions.

Users prioritizing maximum storage space should select the Western Digital WD Black SN770 2TB to take advantage of its superior capacity. Those who prioritize the inclusion of a DRAM cache for their specific workload requirements should opt for the Western Digital WD Black SN850X 1TB with Heatsink. Your choice depends entirely on whether your primary need is the ability to store more data or the technical benefits provided by the integrated DRAM cache.