Performance wise, they are technically the same type of lsd (helical) so they should perform about the same (feel free to chime in if somehow it’s been proven that the quaife is better/worse). Durability wise and warranty and resale on the quaife is unbeatable. The quaife will not break pretty much no matter what you throw at it power-wise. If it does, quaife has a lifetime warranty, which means if you do manage to break it, they will replace it for free. As said before, the resale on the quaife is much higher than any diff for the above reasons. These units sell for pretty much $1000 each normally.