Im sure both have their pro's and cons its just a case of personal preference
However for me the Q4 four wheel drive system was one of the reasons for getting it, particularly as where I live it often gets snowy and icy over the winter months. It is one of of the most sophisticated 4 wheel drive system there is i read is similar to the Audi RS6 permanent 4 wheel drive system. Can vary the power from front to back by a large percentage, and uses a clever 3rd diff.
The roads around here are also very bumpy and potholey, so did n't want harder suspension so ruled out the prodrive, though it does have a nicer interior, sportier exhaust and those lightweight wheels. Both versions are winners, you cant really go wrong with either .