So your RS7 can't drive in the snow? It is lower yes but I would imagine the roads are not horrible because not everybody has drives a lifted truck daily.
Honestly, the rs7 is too nice for the snow for me. I drive my gtr all winter with snow tires. I have my kids 50% of the time and don't care about them dirtying up the truck. I cringe every time they get in the gtr with salty, snowy boots and climb over the center counsel to get in the back. I'm sure the Audi would do fine in snow--my buddy dailies his modded s6 with winter wheels in the snow. I like the weight and wheelbase of the raptor. I literally care less if I slide into or over curbs in that truck. That happens once in the gtr or Audi and it's a flat tire. I pulled my plow guy out of my yard last year when he slid off my driveway.