Thanks for taking the effort of putting the pics up and explain.
The Athena RS and Chorus RS cranks under the links are early-mid 90s. My Chorus groupset (of the 1st gen) is late 80s/early 90s. The Athena RS chainset looks similar to the 1st generation Chorus. Possibly with a lower finishing level.
I do also have available a 2004 all aluminium Campagnolo Centaur 3x10 groupset. Blend of old world with new world quality. Very nice for the retro style build >>>