Classic Audi "weaknesses" from a driver's car standpoint, though the RS7 is better than most in this regard.
"Cadillac on steroids "
LOL! I guess it depends on what generation you are from; Caddi's in my day were soft and wallowy, which is completely different than "smooth" (to the point of being numb)
I wish the steering on the RS7 had a bit more "feel" (without getting twitchy or nervous) and the brakes and throttle were just a bit easier to modulate, but again, they are already better than most.
Let's make sure you get a chance to try those other models!
Cheers,
TM