No it isn't the same thing.
Trezeguet has gotten many opportunities to play for France. At one time, in the eyes of Domenech and the other coaches before him, Trez was good enough to start for the French. Now, for whatever reason, Domenech doesn't feel that way, and as stupid as his opinion is, he at least has a body of work to go on to determine whether or not he still fits into his plans. It could be that Doemench is trying to go in a younger direction for the national team. I don't know for sure, I don't follow them at all
Amauri has never been called up, never gotten the opportunity, never even had his name mentioned to play for Brazil, so there is obviously something there that
dunga and his predeccesors see.
There's a big difference between no longer being called up and not being called up at all, especially considering that Amauri will be 30 years old by the time the World Cup starts