The Seasonic VERTEX GX-1200 is the objective winner of this comparison, securing victories in four out of seven evaluated specifications. Its most significant advantage over the competition is its warranty coverage, which is 140% better than that offered by the Lian Li SP750. While the Lian Li SP750 holds a 43% advantage in MSRP, the superior reliability terms provided by the Seasonic VERTEX GX-1200 establish it as the more robust option for long-term power delivery.

Users prioritizing budget constraints should select the Lian Li SP750, as it offers a clear advantage in initial cost. Conversely, those who value extended manufacturer support and long-term security should choose the Seasonic VERTEX GX-1200. By opting for the latter, buyers benefit from a significantly longer warranty period, making it the ideal choice for high-end builds where component longevity and manufacturer backing are the primary requirements for a power supply unit.