The Western Digital WD Black SN850X 4TB is the objective winner of this comparison, securing a victory in one of the seven evaluated specifications. Its most impactful advantage is a 12% better MSRP compared to the alternative. While both drives share identical performance capabilities across the remaining six metrics, the standard model provides a clear financial benefit for those prioritizing the initial cost of their storage solution.

Choose the Western Digital WD Black SN850X 4TB if you are looking for the most cost-effective option and do not require additional thermal management hardware. Conversely, select the Western Digital WD Black SN850X 4TB with Heatsink if your specific build environment necessitates an integrated cooling solution. Since both drives offer the same technical specifications, your decision should rely entirely on whether your system configuration requires the included heatsink or if you prefer the lower MSRP.