[jwyatt]

I can't believe there would be any difference in feel between any of the torsen diffs available (such as the Q2 and the Quaife). A plate-type diff would be another matter. I would expect differences in feel between a Quaife and a Q2 car, if observed, to be down to other factors such as the suspension setup/geometry, tyres, condition, etc. In my view the Quaife is basically a better made version of the Q2, though the Q2 itself has proven very strong in the hands of some of the guys on here with 3.7l and supercharged cars, so hardly seems a worry!