[ChiefNotAClue]

Seasonic's product lines are relatively simple to figure out. They haven't changed in years, except with the addition of the Vertex line. At the very least, they're easier to understand than other power supply manufacturers.

Product Lines: Core (Budget) < Focus (Mid) < Vertex (Mid-High) < Prime (High), in terms of quality and features.

80Plus Efficiency: GX (Gold) < PX (Platinum) < TX (Titanium)

This is true across all of their product lines.