Adobe Audition vs. Audacity

[MadTiger3000]

This is not a "which is better" thread.

This is a challenge, really. I am a huge fan of Audacity for several reasons.

Read carefully:

What does Audition do that you absolutely cannot do in Audacity?
Not something that makes a process easier. I am talking about ultimately getting to whatever goal you have by any means available in the program.

Just facts, not opinions.

What can't you do?

[Operationdnb]

For mastering I like logic 7.1 but i guess what ever you feel most comfortable with