The Corsair SF850 is the objective winner of this comparison, securing more individual specification victories than its counterpart. While the Corsair HX1500i offers a significant advantage in total power capacity, providing 76% more wattage than the alternative, the Corsair SF850 holds the most impactful edge in this matchup. By offering a 43% better MSRP, the latter provides a more favorable value proposition based on the provided specifications for users prioritizing cost efficiency.

Choose the Corsair HX1500i if your system requirements demand the highest possible power output, as its superior wattage capacity is its primary strength. Conversely, select the Corsair SF850 if you are looking to optimize your budget, as its lower MSRP makes it the more economical choice. These two units serve distinct needs, with the former catering to high-draw configurations and the latter appealing to those focused on the financial aspects of their build.