rs4 torsen good or bad upgrade?

[Jamo]

I took out the torsen diff form ABY gearbox and it took only 6 or 8 screws on the back end of the gearbox to take it out.

Cool I'll have to pop down to 4wheeldrifters magic garage of parts and "borrow" his

[caterpillar]

have the v8 thorsen and the others( audi urq) the same P/N
think its stamped on the part too....
i will use the audi urq ones... and 3,889 ratio
with v8 thorsen in rear too.