The Seasonic VERTEX GX-1200 is the objective winner of this comparison, securing victory in five out of nine evaluated specifications. Its most impactful advantage is the inclusion of a 12VHPWR connector, which represents a 100% improvement over the EVGA SuperNOVA 1000 G6. While the latter remains a viable option, the superior connectivity offered by the Seasonic unit makes it the more versatile choice for modern hardware configurations requiring updated power delivery standards.

Users should choose the Seasonic VERTEX GX-1200 if they require the 12VHPWR connector for current-generation components that utilize this specific interface. Conversely, the EVGA SuperNOVA 1000 G6 is the better selection for builders who prioritize a higher count of traditional PCIe connectors, as it offers a 100% advantage in that category. Selecting between these two power supplies depends entirely on whether your build necessitates modern 12VHPWR support or a greater quantity of standard PCIe connections.