A big difference between a Quaife and the typical limited slip diff, which I think is what K-Dawg was trying to point out, is that if you take all the load off one wheel with a Quaife it behaves like an open diff. i.e., one wheel in the air, apply power, only the lifted wheel spins and ZERO torque goes to the other wheel. Apply a enough resistance (load) the lifted wheel, and the Quaife will eventually figure it out and move some of the torque to the other one, too. That's not typical LSD behavior.
The lines are blurry around what people typically mean by LSD, and there are so many technologies, e.g., lockers, Torsens, Quaifes, clutch-packed diffs, etc., etc., that it's not surprising that there's confusion.
