I'm considering downsizing the B7 avant to a Sportback 170 CR Quattro - now the Quattro Avant is unstoppable in winter and being pretty rural where we are that's a lifesaver in the silly snow. I'm interested in anyone who can make a direct comparison between that and the A3's version of the Quattro system - would we notice a difference and would an A3 be just as unstoppable? Any info great fully received :-)