What are you going to use it for?
I heard the Treks are a less racy possition, meant to be more confy for long rides, personally didnt feel it myself.
The Bianchi is the c2c(coast to coast) bikes right? They also are more relaxed geometry.
No idea about the others, depends exactly what you want to use it for. Then once you know that you should ride all the possible suiters and see which one you like the feel of.