I currently run a Peloquin in my 020 16V Golf (disclamer: it is not a SCCA IT car it is a Confrence E Production but very similar to IT specs)I have also run a Quaife. I like the Peloquin better than the Quaife. Gary Peloquin has told me that the ramp angles on the gears are steeper than that that on the Quaife giving more bias than the Quaife. He also does more in the way of heat treating and cryo treating than the Quaife. IMO the Peloquin is the better of the two diffs and I recomend it for the price. Now is the VWMS diff better than a T/B Diff? I would have to say yes, but have never driven one so I am no one to ask for the advise there. Sonething to think about with the Peloquin, it comes with a bolt kit installed ($55) and diff bearings ($50) installed and is shipped, well in the 48 states, for that price, the Quaife, all that is extra.
Jon