The MSI MPG A1000G PCIE5 and the MSI MPG A850G PCIE5 are objectively tied, as each component leads in only one of the seven comparable specifications. The primary differentiator between these two power supply units is their specific area of superiority. The MSI MPG A1000G PCIE5 offers an 18% advantage in total wattage capacity, while the MSI MPG A850G PCIE5 provides a 35% advantage in MSRP, making it the more cost-effective option based on the provided data.

Users requiring higher power output for demanding hardware configurations should select the MSI MPG A1000G PCIE5 to leverage its superior wattage. Conversely, those prioritizing budget efficiency should choose the MSI MPG A850G PCIE5, as it offers a significant advantage in MSRP. Since both units share identical specifications across five other categories, the decision rests entirely on whether your build necessitates the additional power headroom or the lower initial cost.