Ive read that too, not sure I buy it.
Gears for alot of axles are outsourced and most of our Jeep axles are one of those, most major gear companies gears come out of the same factory in Korea and are pretty much identical.
They look the same, setup the same, run quiet,even have identical numbers and symbols stamped in them, and in the case of Yukon/USA std have word for word identical warranties.