Hello,
My wife and I picked up a pair of the new bikes last Saturday. I got the Passage 4.0, she got the Passage 3.0. From what I can tell the only difference is that the 3.0 has Revo shifters and the 4.0 has the thumb shifters. We put about 40mi on them Sunday, and are really happy with them. I do have to say that I like the thumb shifters better then the revo, but that is just me, my wife is very happy with the twist shift! I can't tell how much they differ from the c40 because I am unable to find any detailed specs on them! The LBS did not have info either! If someone is interested in the c40, I think that the Passage 3.0 or 4.0 is worth a look! Just my thoughts.

LEJ