Hmm, the torsen ofna diff is billed to have a 5:1 bias ratio. Any reason why it will not help with ballooning? It can't send all the power to the rear, but it can get more that a silicone filled diff will... Should help with braking too.
The xray diff design is not as good as the torsen IMO. I may give one a try as I have a dozen vehicles that I could use it in...
that xray diff does look the same. I thought (whoever) said it was the same as the stock xray diffs.
Ofna torsen won't help with front tyre balooning, as soon as the load is off the front it will be as open as any diff can be, it needs a bit of load to work properly.