Which Groupset?

Two things:

[*]Chorus levers are Ultra-Shift, Athena levers are Power-Shift. Only Campagnolo's upmarket levers now allow you to up-shift a handful of sprockets at a time. With Athena, you can only go up one gear per press of the thumb-shifter.

Bullshit.
I had a 2010 Athena 11 speed groupset, And you can shift almost half the block in both directions depending on how far down you push the thumb shifter.
I'm still using the Athena levers with new Super Record cranks & mechs on a new build now.... and it all works fine together.

I've ridden both Athena and Chorus (both with carbon crank set up)... not really any noticable difference if its all set up properly . Weight is the main thing I think.
Also, Chorus has proper carbon levers, where Athena has plastic jobbies that are made to look like carbon.