The be quiet! Straight Power 12 850W and the Corsair SF850 are objectively tied, as both units secure an equal number of spec victories across the evaluated categories. The be quiet! Straight Power 12 850W holds a 20% advantage in MSRP, making it the more cost-effective option based on the provided data. Conversely, the Corsair SF850 maintains a 3% lead regarding its ATX version, representing the only other measurable performance distinction between these two power supplies.

Choose the be quiet! Straight Power 12 850W if your primary goal is to minimize your initial investment, as it offers a significant 20% advantage in MSRP. If your build requirements prioritize the latest ATX version standards, the Corsair SF850 is the superior selection. Since both units are otherwise identical in their specifications, your final decision should rely entirely on whether you value the lower cost of the former or the updated ATX version of the latter.