The TL should be more reliable statistically but the Audi would handle the elements better (I am a huge fan of AWD by the way) and might be more fun to drive. Have you test drove either of these cars? What about the purchase price, insurance premiums, gas mileage, warranties, maintenance intervals, etc? All of these things should be considered.
I used to own a VW Sirocco and while it wasn't the most reliable car I owned it was fun to drive. I didn't buy it for the reliability however. I currently have a 96 A4 Quattro with 144k miles on it and is being retired because it is getting too expensive to repair all the time. The dealer here gets $100/hr to work on them so I have always taken it to local mechanics. It was a champion in the snow and fun to drive but it is just getting old and falling apart. We also have a 98 Honda CRV and it has been very reliable (knock on wood). Based on my limited experience with the brands the Honda (Acura) would be the more reliable choice.
I just bought a Subaru to replace the Audi and although it was less expensive to buy and insure, uses regular gas and should be more reliable it sure is a step back in terms of stature, refinement and 'fun to drive' factor. In my case the lower cost, more reliable option won out in the end.