in fact this might work to go to the article directly directly:
There are changes for the 2002 -- and you CAN order a 2002 A6 2.7t NOW. But it will take a few months for it to come in.
Nothing here is meant to disparage the 2001 A6 2.7t. But, if you can wait, I would go for the 2002 based on the write up at the above URL.