USA Standard Gear 8.75 Axles

"What is the difference between Randy's and USA standard gears?
Spartan's are made, heat treated, etc right here in the PNW. USA Standard is a Randy's value line. Yukon and Hard Core are premium lines. USA Standard gears are made by Yukon - same materials, process, plant, drawings, etc."
If everything is the same, I wonder how they cut costs for the value line...