If the replacement parts for the innards are the same for the four groups, then I would ALSO interpret the QS as being the XENON with new blades & levers.nerdag said:As for the Xenon/Mirage/Veloce/Centaur differences, a glance of the 2007/08 Campag spare parts manuals (available on their website) gives me the impression that the only difference between the four shifters is a different brake lever blade. All the other spare parts codes for everything else (shifter assembly, body, innards etc.) are the same for those four groups.
I could be wrong, but I don't see how else to interpret it.