I agree, Audi should focus on building an Audi, and forget about trying to match the experience of a BMW. When Audi focuses on producing a BMW-like driving experience then it leaves people with no choice but to compare it to the ultimate player in that game.
I love Audi for being Audi and giving us a different kind of driving feel, not for coming close to BMW-like performance.
For a BMW driving experience, I simply drive a BMW.