The Seasonic VERTEX GX-1200 is the objective winner of this comparison, securing a lead in four out of seven evaluated specifications. Its most impactful advantage over the competition is the inclusion of a 12VHPWR connector, which represents a 100% improvement in connectivity capability. While the Seasonic Focus GX-850 remains a viable alternative, it falls behind in total spec count despite maintaining a 48% advantage in MSRP, which stands as its primary strength in this head-to-head evaluation.

Users prioritizing modern hardware compatibility should select the Seasonic VERTEX GX-1200 to utilize its native 12VHPWR connector support. This unit is the superior choice for high-end builds requiring advanced power delivery standards. Conversely, budget-conscious builders who do not require the latest connector technology should opt for the Seasonic Focus GX-850. This model provides a more cost-effective solution for systems that do not demand the higher power output or specific connectivity features found in the higher-tier unit.