The Atlas Austria track is the older Code 160 track that to my knowledge is no longer in production. It's pretty good and somewhat hard to find, but a lot of people still use it, including a few 3-railers I've met. I hadn't heard of any Atlas track made in Italy, but the current Atlas 2-rail track is made in China and is Code 148 rail. You can also get Micro Engineering Code 148 track through MicroMark and AM Hobbies.
Hope this helps some.