Originally Posted by chuck731
Chorus and Record are also nearly identical. Although Campy claims Record cranks (both alloy and carbon) are lighter than Chorus, independent measurements show they are infact exactly identical in all repsects. Most components in chorus brakes and derailleurs are also exactly identical to their counterpart in Record. Record has a few pins, cages and pivots that are made of more fancy material and more elabrately shaped to reduce weight.
Chrous is only ~40 grams heavier than Dura-Ace, so Mr. Campy-guy bristles when you compare Record and Dura-Ace, he claims it isn't fair, that Record is in a league all its own. I've owned Record and Dura-Ace bikes (although not 10S Dura-Ace, though I have ridden it). I just prefer Campy for the way the shifters work, and the "Campy wears in, Shimano wears out" thing, which is accurate. I'm running a Centaur Rear Derailleur on my TT bike and it shifts very well. Campy is rumored to be introducing a new BB/crank setup. I'm currently running a Chours Carbon crank with Phil Ti BB. I bought the Chours model for the reason mentioned above. The brakes and derailleurs on Record are functionally the same as Chours as mentioned above. Just a few bits of titanium and carbon make the groupset lighter. Really not necessary unless you are rich or already at 5% body fat, and/or just need/want 'the best.'